1670613187 has 4 divisors (see below), whose sum is σ = 1670775336. Its totient is φ = 1670451040.

The previous prime is 1670613067. The next prime is 1670613193. The reversal of 1670613187 is 7813160761.

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

It is a cyclic number.

It is not a de Polignac number, because 1670613187 - 2⁷ = 1670613059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670613587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64489 + ... + 86602.

It is an arithmetic number, because the mean of its divisors is an integer number (417693834).

Almost surely, 2^1670613187 is an apocalyptic number.

1670613187 is a deficient number, since it is larger than the sum of its proper divisors (162149).

1670613187 is a wasteful number, since it uses less digits than its factorization.

1670613187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162148.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1670613187 is about 40873.1352724500. The cubic root of 1670613187 is about 1186.5661872676.

The spelling of 1670613187 in words is "one billion, six hundred seventy million, six hundred thirteen thousand, one hundred eighty-seven".