97979291 has 2 divisors, whose sum is σ = 97979292. Its totient is φ = 97979290.

The previous prime is 97979281. The next prime is 97979309. The reversal of 97979291 is 19297979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97979291 - 2¹⁰ = 97978267 is a prime.

It is not a weakly prime, because it can be changed into another prime (97979281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48989645 + 48989646.

It is an arithmetic number, because the mean of its divisors is an integer number (48989646).

Almost surely, 2^97979291 is an apocalyptic number.

97979291 is a deficient number, since it is larger than the sum of its proper divisors (1).

97979291 is an equidigital number, since it uses as much as digits as its factorization.

97979291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 53.

The square root of 97979291 is about 9898.4489188963. The cubic root of 97979291 is about 461.0111515694.

The spelling of 97979291 in words is "ninety-seven million, nine hundred seventy-nine thousand, two hundred ninety-one".