97725491 has 2 divisors, whose sum is σ = 97725492. Its totient is φ = 97725490.

The previous prime is 97725487. The next prime is 97725497. The reversal of 97725491 is 19452779.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97725491 - 2² = 97725487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97725497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48862745 + 48862746.

It is an arithmetic number, because the mean of its divisors is an integer number (48862746).

Almost surely, 2^97725491 is an apocalyptic number.

97725491 is a deficient number, since it is larger than the sum of its proper divisors (1).

97725491 is an equidigital number, since it uses as much as digits as its factorization.

97725491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 97725491 is about 9885.6204155329. The cubic root of 97725491 is about 460.6127483214.

The spelling of 97725491 in words is "ninety-seven million, seven hundred twenty-five thousand, four hundred ninety-one".