137640859 has 2 divisors, whose sum is σ = 137640860. Its totient is φ = 137640858.

The previous prime is 137640829. The next prime is 137640869. The reversal of 137640859 is 958046731.

137640859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137640859 - 2¹¹ = 137638811 is a prime.

It is not a weakly prime, because it can be changed into another prime (137640829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68820429 + 68820430.

It is an arithmetic number, because the mean of its divisors is an integer number (68820430).

Almost surely, 2^137640859 is an apocalyptic number.

137640859 is a deficient number, since it is larger than the sum of its proper divisors (1).

137640859 is an equidigital number, since it uses as much as digits as its factorization.

137640859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 137640859 is about 11732.0441100432. The cubic root of 137640859 is about 516.3162472074.

The spelling of 137640859 in words is "one hundred thirty-seven million, six hundred forty thousand, eight hundred fifty-nine".