97389791 has 2 divisors, whose sum is σ = 97389792. Its totient is φ = 97389790.

The previous prime is 97389767. The next prime is 97389829. The reversal of 97389791 is 19798379.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97389791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97389701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48694895 + 48694896.

It is an arithmetic number, because the mean of its divisors is an integer number (48694896).

Almost surely, 2^97389791 is an apocalyptic number.

97389791 is a deficient number, since it is larger than the sum of its proper divisors (1).

97389791 is an equidigital number, since it uses as much as digits as its factorization.

97389791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 53.

The square root of 97389791 is about 9868.6266015084. The cubic root of 97389791 is about 460.0847213204.

The spelling of 97389791 in words is "ninety-seven million, three hundred eighty-nine thousand, seven hundred ninety-one".