137690389 has 2 divisors, whose sum is σ = 137690390. Its totient is φ = 137690388.

The previous prime is 137690383. The next prime is 137690411. The reversal of 137690389 is 983096731.

137690389 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 can be written as a sum of positive squares in only one way, i.e., 136656100 + 1034289 = 11690^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 137690389 - 2³ = 137690381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137690381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68845194 + 68845195.

It is an arithmetic number, because the mean of its divisors is an integer number (68845195).

Almost surely, 2^137690389 is an apocalyptic number.

It is an amenable number.

137690389 is a deficient number, since it is larger than the sum of its proper divisors (1).

137690389 is an equidigital number, since it uses as much as digits as its factorization.

137690389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 137690389 is about 11734.1548055239. The cubic root of 137690389 is about 516.3781718351.

The spelling of 137690389 in words is "one hundred thirty-seven million, six hundred ninety thousand, three hundred eighty-nine".