137640751 has 2 divisors, whose sum is σ = 137640752. Its totient is φ = 137640750.

The previous prime is 137640743. The next prime is 137640773. The reversal of 137640751 is 157046731.

137640751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137640751 - 2³ = 137640743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137644751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68820375 + 68820376.

It is an arithmetic number, because the mean of its divisors is an integer number (68820376).

Almost surely, 2^137640751 is an apocalyptic number.

137640751 is a deficient number, since it is larger than the sum of its proper divisors (1).

137640751 is an equidigital number, since it uses as much as digits as its factorization.

137640751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 137640751 is about 11732.0395072639. The cubic root of 137640751 is about 516.3161121647.

The spelling of 137640751 in words is "one hundred thirty-seven million, six hundred forty thousand, seven hundred fifty-one".