97924139 has 2 divisors, whose sum is σ = 97924140. Its totient is φ = 97924138.

The previous prime is 97924121. The next prime is 97924159. The reversal of 97924139 is 93142979.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97924139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97924139.

It is not a weakly prime, because it can be changed into another prime (97924109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48962069 + 48962070.

It is an arithmetic number, because the mean of its divisors is an integer number (48962070).

Almost surely, 2^97924139 is an apocalyptic number.

97924139 is a deficient number, since it is larger than the sum of its proper divisors (1).

97924139 is an equidigital number, since it uses as much as digits as its factorization.

97924139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 97924139 is about 9895.6626357208. The cubic root of 97924139 is about 460.9246351265.

It can be divided in two parts, 9792 and 4139, that added together give a palindrome (13931).

The spelling of 97924139 in words is "ninety-seven million, nine hundred twenty-four thousand, one hundred thirty-nine".