97097531 has 2 divisors, whose sum is σ = 97097532. Its totient is φ = 97097530.

The previous prime is 97097521. The next prime is 97097579. The reversal of 97097531 is 13579079.

It is a weak prime.

It is an emirp because it is prime and its reverse (13579079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97097531 - 2¹⁴ = 97081147 is a prime.

It is a super-2 number, since 2×97097531² = 18855861052591922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97097521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48548765 + 48548766.

It is an arithmetic number, because the mean of its divisors is an integer number (48548766).

Almost surely, 2^97097531 is an apocalyptic number.

97097531 is a deficient number, since it is larger than the sum of its proper divisors (1).

97097531 is an equidigital number, since it uses as much as digits as its factorization.

97097531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 97097531 is about 9853.8079441402. The cubic root of 97097531 is about 459.6240327477.

The spelling of 97097531 in words is "ninety-seven million, ninety-seven thousand, five hundred thirty-one".