188970665 has 16 divisors (see below), whose sum is σ = 247157568. Its totient is φ = 137862336.

The previous prime is 188970659. The next prime is 188970671. The reversal of 188970665 is 566079881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (188970659) and next prime (188970671).

It is not a de Polignac number, because 188970665 - 2⁶ = 188970601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12119 + ... + 22908.

It is an arithmetic number, because the mean of its divisors is an integer number (15447348).

Almost surely, 2^188970665 is an apocalyptic number.

It is an amenable number.

188970665 is a deficient number, since it is larger than the sum of its proper divisors (58186903).

188970665 is a wasteful number, since it uses less digits than its factorization.

188970665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35128.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 188970665 is about 13746.6601398303. The cubic root of 188970665 is about 573.8496623768.

The spelling of 188970665 in words is "one hundred eighty-eight million, nine hundred seventy thousand, six hundred sixty-five".