137691963 has 12 divisors (see below), whose sum is σ = 199723680. Its totient is φ = 91409136.

The previous prime is 137691929. The next prime is 137691979. The reversal of 137691963 is 369196731.

It is not a de Polignac number, because 137691963 - 2⁹ = 137691451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137691923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29856 + ... + 34157.

It is an arithmetic number, because the mean of its divisors is an integer number (16643640).

Almost surely, 2^137691963 is an apocalyptic number.

137691963 is a deficient number, since it is larger than the sum of its proper divisors (62031717).

137691963 is a wasteful number, since it uses less digits than its factorization.

137691963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64258 (or 64255 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 137691963 is about 11734.2218745002. The cubic root of 137691963 is about 516.3801394770.

It can be divided in two parts, 1376 and 91963, that added together give a palindrome (93339).

The spelling of 137691963 in words is "one hundred thirty-seven million, six hundred ninety-one thousand, nine hundred sixty-three".