185690897 has 8 divisors (see below), whose sum is σ = 213319296. Its totient is φ = 158337792.

The previous prime is 185690873. The next prime is 185690909. The reversal of 185690897 is 798096581.

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

It is a cyclic number.

It is not a de Polignac number, because 185690897 - 2¹⁴ = 185674513 is a prime.

It is a super-2 number, since 2×185690897² = 68962218457329218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185690867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67373 + ... + 70074.

It is an arithmetic number, because the mean of its divisors is an integer number (26664912).

Almost surely, 2^185690897 is an apocalyptic number.

It is an amenable number.

185690897 is a deficient number, since it is larger than the sum of its proper divisors (27628399).

185690897 is a wasteful number, since it uses less digits than its factorization.

185690897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137647.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 185690897 is about 13626.8447191564. The cubic root of 185690897 is about 570.5103636622.

The spelling of 185690897 in words is "one hundred eighty-five million, six hundred ninety thousand, eight hundred ninety-seven".