137631623 has 2 divisors, whose sum is σ = 137631624. Its totient is φ = 137631622.

The previous prime is 137631617. The next prime is 137631671. The reversal of 137631623 is 326136731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137631623 - 2⁴ = 137631607 is a prime.

It is a super-2 number, since 2×137631623² = 37884927299228258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 137631623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137631023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68815811 + 68815812.

It is an arithmetic number, because the mean of its divisors is an integer number (68815812).

Almost surely, 2^137631623 is an apocalyptic number.

137631623 is a deficient number, since it is larger than the sum of its proper divisors (1).

137631623 is an equidigital number, since it uses as much as digits as its factorization.

137631623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 32.

The square root of 137631623 is about 11731.6504806442. The cubic root of 137631623 is about 516.3046983026.

The spelling of 137631623 in words is "one hundred thirty-seven million, six hundred thirty-one thousand, six hundred twenty-three".