137568690 has 48 divisors (see below), whose sum is σ = 408777408. Its totient is φ = 31444128.

The previous prime is 137568649. The next prime is 137568713. The reversal of 137568690 is 96865731.

It is a happy number.

It is a super-2 number, since 2×137568690² = 37850288936632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 108552 + ... + 109811.

It is an arithmetic number, because the mean of its divisors is an integer number (8516196).

Almost surely, 2^137568690 is an apocalyptic number.

137568690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137568690 is an abundant number, since it is smaller than the sum of its proper divisors (271208718).

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

137568690 is a wasteful number, since it uses less digits than its factorization.

137568690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218383 (or 218380 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 137568690 is about 11728.9679852918. The cubic root of 137568690 is about 516.2259916880.

The spelling of 137568690 in words is "one hundred thirty-seven million, five hundred sixty-eight thousand, six hundred ninety".