137156691 has 16 divisors (see below), whose sum is σ = 209841408. Its totient is φ = 78060000.

The previous prime is 137156683. The next prime is 137156711. The reversal of 137156691 is 196651731.

It is a happy number.

It is not a de Polignac number, because 137156691 - 2³ = 137156683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137156671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7740 + ... + 18281.

It is an arithmetic number, because the mean of its divisors is an integer number (13115088).

Almost surely, 2^137156691 is an apocalyptic number.

137156691 is a deficient number, since it is larger than the sum of its proper divisors (72684717).

137156691 is a wasteful number, since it uses less digits than its factorization.

137156691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282.

The product of its digits is 34020, while the sum is 39.

The square root of 137156691 is about 11711.3915057093. The cubic root of 137156691 is about 515.7101348058.

The spelling of 137156691 in words is "one hundred thirty-seven million, one hundred fifty-six thousand, six hundred ninety-one".