137042639 has 2 divisors, whose sum is σ = 137042640. Its totient is φ = 137042638.

The previous prime is 137042629. The next prime is 137042669. The reversal of 137042639 is 936240731.

137042639 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 an emirp because it is prime and its reverse (936240731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137042639 - 2²⁰ = 135994063 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 137042599 and 137042608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137042629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68521319 + 68521320.

It is an arithmetic number, because the mean of its divisors is an integer number (68521320).

Almost surely, 2^137042639 is an apocalyptic number.

137042639 is a deficient number, since it is larger than the sum of its proper divisors (1).

137042639 is an equidigital number, since it uses as much as digits as its factorization.

137042639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 137042639 is about 11706.5212168261. The cubic root of 137042639 is about 515.5671497216.

The spelling of 137042639 in words is "one hundred thirty-seven million, forty-two thousand, six hundred thirty-nine".