137969191 has 2 divisors, whose sum is σ = 137969192. Its totient is φ = 137969190.

The previous prime is 137969179. The next prime is 137969213. The reversal of 137969191 is 191969731.

137969191 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 137969191 - 2⁷ = 137969063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137969101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68984595 + 68984596.

It is an arithmetic number, because the mean of its divisors is an integer number (68984596).

Almost surely, 2^137969191 is an apocalyptic number.

137969191 is a deficient number, since it is larger than the sum of its proper divisors (1).

137969191 is an equidigital number, since it uses as much as digits as its factorization.

137969191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 46.

The square root of 137969191 is about 11746.0287331506. The cubic root of 137969191 is about 516.7264658269.

The spelling of 137969191 in words is "one hundred thirty-seven million, nine hundred sixty-nine thousand, one hundred ninety-one".