137997697 has 2 divisors, whose sum is σ = 137997698. Its totient is φ = 137997696.

The previous prime is 137997683. The next prime is 137997719. The reversal of 137997697 is 796799731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97535376 + 40462321 = 9876^2 + 6361^2 .

It is a cyclic number.

It is not a de Polignac number, because 137997697 - 2¹⁹ = 137473409 is a prime.

It is not a weakly prime, because it can be changed into another prime (137997617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68998848 + 68998849.

It is an arithmetic number, because the mean of its divisors is an integer number (68998849).

Almost surely, 2^137997697 is an apocalyptic number.

It is an amenable number.

137997697 is a deficient number, since it is larger than the sum of its proper divisors (1).

137997697 is an equidigital number, since it uses as much as digits as its factorization.

137997697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500846, while the sum is 58.

The square root of 137997697 is about 11747.2421018723. The cubic root of 137997697 is about 516.7620505594.

The spelling of 137997697 in words is "one hundred thirty-seven million, nine hundred ninety-seven thousand, six hundred ninety-seven".