137912897 has 2 divisors, whose sum is σ = 137912898. Its totient is φ = 137912896.

The previous prime is 137912861. The next prime is 137912903. The reversal of 137912897 is 798219731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75881521 + 62031376 = 8711^2 + 7876^2 .

It is an emirp because it is prime and its reverse (798219731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137912897 - 2⁸ = 137912641 is a prime.

It is not a weakly prime, because it can be changed into another prime (137912297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68956448 + 68956449.

It is an arithmetic number, because the mean of its divisors is an integer number (68956449).

Almost surely, 2^137912897 is an apocalyptic number.

It is an amenable number.

137912897 is a deficient number, since it is larger than the sum of its proper divisors (1).

137912897 is an equidigital number, since it uses as much as digits as its factorization.

137912897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 47.

The square root of 137912897 is about 11743.6321894038. The cubic root of 137912897 is about 516.6561782586.

The spelling of 137912897 in words is "one hundred thirty-seven million, nine hundred twelve thousand, eight hundred ninety-seven".