137787864 has 32 divisors (see below), whose sum is σ = 344977920. Its totient is φ = 45861536.

The previous prime is 137787851. The next prime is 137787869. The reversal of 137787864 is 468787731.

137787864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137787869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13969 + ... + 21695.

It is an arithmetic number, because the mean of its divisors is an integer number (10780560).

Almost surely, 2^137787864 is an apocalyptic number.

It is an amenable number.

137787864 is an abundant number, since it is smaller than the sum of its proper divisors (207190056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137787864 is a wasteful number, since it uses less digits than its factorization.

137787864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8479 (or 8475 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 137787864 is about 11738.3075441053. The cubic root of 137787864 is about 516.4999960953.

It can be divided in two parts, 13 and 7787864, that added together give a palindrome (7787877).

The spelling of 137787864 in words is "one hundred thirty-seven million, seven hundred eighty-seven thousand, eight hundred sixty-four".