1670172479 has 4 divisors (see below), whose sum is σ = 1670429880. Its totient is φ = 1669915080.

The previous prime is 1670172467. The next prime is 1670172499. The reversal of 1670172479 is 9742710761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670172479 is a prime.

It is a super-2 number, since 2×1670172479² = 5578952219218010882, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670172499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118709 + ... + 132030.

It is an arithmetic number, because the mean of its divisors is an integer number (417607470).

Almost surely, 2^1670172479 is an apocalyptic number.

1670172479 is a deficient number, since it is larger than the sum of its proper divisors (257401).

1670172479 is an equidigital number, since it uses as much as digits as its factorization.

1670172479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257400.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 1670172479 is about 40867.7437473614. The cubic root of 1670172479 is about 1186.4618393142.

The spelling of 1670172479 in words is "one billion, six hundred seventy million, one hundred seventy-two thousand, four hundred seventy-nine".