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1670 = 25167

1670 has 8 divisors (see below), whose sum is σ = 3024. Its totient is φ = 664.

The previous prime is 1669. The next prime is 1693. The reversal of 1670 is 761.

It is a happy number.

1670 is nontrivially palindromic in base 16.

1670 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

1670 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

1670 is an undulating number in base 16.

1670 is strictly pandigital in base 5.

It is a plaindrome in base 9 and base 11.

It is a nialpdrome in base 12, base 14 and base 15.

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74 + ... + 93.

It is an arithmetic number, because the mean of its divisors is an integer number (378).

21670 is an apocalyptic number.

1670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1670 is a deficient number, since it is larger than the sum of its proper divisors (1354).

1670 is a wasteful number, since it uses less digits than its factorization.

1670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 1670 is about 40.8656334834. The cubic root of 1670 is about 11.8642099587.

Subtracting from 1670 its reverse (761), we obtain a palindrome (909).

The spelling of 1670 in words is "one thousand, six hundred seventy".

Divisors: 1 2 5 10 167 334 835 1670