185668137 has 6 divisors (see below), whose sum is σ = 268187322. Its totient is φ = 123778752.

The previous prime is 185668111. The next prime is 185668139. The reversal of 185668137 is 731866581.

185668137 is a `hidden beast` number, since 1 + 8 + 566 + 81 + 3 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 26378496 = 12621^2 + 5136^2 .

It is not a de Polignac number, because 185668137 - 2⁷ = 185668009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 185668092 and 185668101.

It is not an unprimeable number, because it can be changed into a prime (185668139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10314888 + ... + 10314905.

It is an arithmetic number, because the mean of its divisors is an integer number (44697887).

Almost surely, 2^185668137 is an apocalyptic number.

It is an amenable number.

185668137 is a deficient number, since it is larger than the sum of its proper divisors (82519185).

185668137 is a wasteful number, since it uses less digits than its factorization.

185668137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20629799 (or 20629796 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 185668137 is about 13626.0095772754. The cubic root of 185668137 is about 570.4870536945.

The spelling of 185668137 in words is "one hundred eighty-five million, six hundred sixty-eight thousand, one hundred thirty-seven".