137806161 has 4 divisors (see below), whose sum is σ = 183741552. Its totient is φ = 91870772.

The previous prime is 137806157. The next prime is 137806169. The reversal of 137806161 is 161608731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137806161 - 2² = 137806157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137806169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22967691 + ... + 22967696.

It is an arithmetic number, because the mean of its divisors is an integer number (45935388).

Almost surely, 2^137806161 is an apocalyptic number.

It is an amenable number.

137806161 is a deficient number, since it is larger than the sum of its proper divisors (45935391).

137806161 is an equidigital number, since it uses as much as digits as its factorization.

137806161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45935390.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 137806161 is about 11739.0868895328. The cubic root of 137806161 is about 516.5228572817.

The spelling of 137806161 in words is "one hundred thirty-seven million, eight hundred six thousand, one hundred sixty-one".