97924991 has 2 divisors, whose sum is σ = 97924992. Its totient is φ = 97924990.

The previous prime is 97924987. The next prime is 97925011. The reversal of 97924991 is 19942979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97924991 - 2² = 97924987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97924921) 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, 48962495 + 48962496.

It is an arithmetic number, because the mean of its divisors is an integer number (48962496).

Almost surely, 2^97924991 is an apocalyptic number.

97924991 is a deficient number, since it is larger than the sum of its proper divisors (1).

97924991 is an equidigital number, since it uses as much as digits as its factorization.

97924991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 50.

The square root of 97924991 is about 9895.7056847908. The cubic root of 97924991 is about 460.9259718982.

The spelling of 97924991 in words is "ninety-seven million, nine hundred twenty-four thousand, nine hundred ninety-one".