137908643 has 8 divisors (see below), whose sum is σ = 139147440. Its totient is φ = 136674720.

The previous prime is 137908637. The next prime is 137908649. The reversal of 137908643 is 346809731.

It is an interprime number because it is at equal distance from previous prime (137908637) and next prime (137908649).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137908643 - 2⁴ = 137908627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137908643.

It is not an unprimeable number, because it can be changed into a prime (137908649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76193 + ... + 77981.

It is an arithmetic number, because the mean of its divisors is an integer number (17393430).

Almost surely, 2^137908643 is an apocalyptic number.

137908643 is a deficient number, since it is larger than the sum of its proper divisors (1238797).

137908643 is a wasteful number, since it uses less digits than its factorization.

137908643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 137908643 is about 11743.4510685743. The cubic root of 137908643 is about 516.6508660216.

The spelling of 137908643 in words is "one hundred thirty-seven million, nine hundred eight thousand, six hundred forty-three".