137631797 has 2 divisors, whose sum is σ = 137631798. Its totient is φ = 137631796.

The previous prime is 137631773. The next prime is 137631803. The reversal of 137631797 is 797136731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107972881 + 29658916 = 10391^2 + 5446^2 .

It is a cyclic number.

It is not a de Polignac number, because 137631797 - 2¹² = 137627701 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 (137631727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68815898 + 68815899.

It is an arithmetic number, because the mean of its divisors is an integer number (68815899).

Almost surely, 2^137631797 is an apocalyptic number.

It is an amenable number.

137631797 is a deficient number, since it is larger than the sum of its proper divisors (1).

137631797 is an equidigital number, since it uses as much as digits as its factorization.

137631797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 44.

The square root of 137631797 is about 11731.6578964782. The cubic root of 137631797 is about 516.3049158809.

The spelling of 137631797 in words is "one hundred thirty-seven million, six hundred thirty-one thousand, seven hundred ninety-seven".