97915687537 has 2 divisors, whose sum is σ = 97915687538. Its totient is φ = 97915687536.

The previous prime is 97915687433. The next prime is 97915687549. The reversal of 97915687537 is 73578651979.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57427808881 + 40487878656 = 239641^2 + 201216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97915687537 is a prime.

It is a super-3 number, since 3×97915687537³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (97915687567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48957843768 + 48957843769.

It is an arithmetic number, because the mean of its divisors is an integer number (48957843769).

Almost surely, 2^97915687537 is an apocalyptic number.

It is an amenable number.

97915687537 is a deficient number, since it is larger than the sum of its proper divisors (1).

97915687537 is an equidigital number, since it uses as much as digits as its factorization.

97915687537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100018800, while the sum is 67.

The spelling of 97915687537 in words is "ninety-seven billion, nine hundred fifteen million, six hundred eighty-seven thousand, five hundred thirty-seven".