137531497 has 2 divisors, whose sum is σ = 137531498. Its totient is φ = 137531496.

The previous prime is 137531483. The next prime is 137531533. The reversal of 137531497 is 794135731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88755241 + 48776256 = 9421^2 + 6984^2 .

It is a cyclic number.

It is not a de Polignac number, because 137531497 - 2¹¹ = 137529449 is a prime.

It is a super-2 number, since 2×137531497² = 37829825334122018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137531437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68765748 + 68765749.

It is an arithmetic number, because the mean of its divisors is an integer number (68765749).

Almost surely, 2^137531497 is an apocalyptic number.

It is an amenable number.

137531497 is a deficient number, since it is larger than the sum of its proper divisors (1).

137531497 is an equidigital number, since it uses as much as digits as its factorization.

137531497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 137531497 is about 11727.3823592479. The cubic root of 137531497 is about 516.1794652973.

The spelling of 137531497 in words is "one hundred thirty-seven million, five hundred thirty-one thousand, four hundred ninety-seven".