137690961 has 4 divisors (see below), whose sum is σ = 183587952. Its totient is φ = 91793972.

The previous prime is 137690951. The next prime is 137690981. The reversal of 137690961 is 169096731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 169096731 = 3 ⋅56365577.

It is a cyclic number.

It is not a de Polignac number, because 137690961 - 2¹¹ = 137688913 is a prime.

It is a super-2 number, since 2×137690961² = 37917601482207042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137690911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22948491 + ... + 22948496.

It is an arithmetic number, because the mean of its divisors is an integer number (45896988).

Almost surely, 2^137690961 is an apocalyptic number.

It is an amenable number.

137690961 is a deficient number, since it is larger than the sum of its proper divisors (45896991).

137690961 is an equidigital number, since it uses as much as digits as its factorization.

137690961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45896990.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 137690961 is about 11734.1791787922. The cubic root of 137690961 is about 516.3788868884.

It can be divided in two parts, 1376909 and 61, that added together give a triangular number (1376970 = T₁₆₅₉).

The spelling of 137690961 in words is "one hundred thirty-seven million, six hundred ninety thousand, nine hundred sixty-one".