97531537 has 2 divisors, whose sum is σ = 97531538. Its totient is φ = 97531536.

The previous prime is 97531531. The next prime is 97531571. The reversal of 97531537 is 73513579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 45171841 = 7236^2 + 6721^2 .

It is a cyclic number.

It is not a de Polignac number, because 97531537 - 2³ = 97531529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97531537.

It is not a weakly prime, because it can be changed into another prime (97531531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48765768 + 48765769.

It is an arithmetic number, because the mean of its divisors is an integer number (48765769).

Almost surely, 2^97531537 is an apocalyptic number.

It is an amenable number.

97531537 is a deficient number, since it is larger than the sum of its proper divisors (1).

97531537 is an equidigital number, since it uses as much as digits as its factorization.

97531537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 99225, while the sum is 40.

The square root of 97531537 is about 9875.8056380227. The cubic root of 97531537 is about 460.3078232651.

The spelling of 97531537 in words is "ninety-seven million, five hundred thirty-one thousand, five hundred thirty-seven".