97973791 has 2 divisors, whose sum is σ = 97973792. Its totient is φ = 97973790.

The previous prime is 97973789. The next prime is 97973819. The reversal of 97973791 is 19737979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97973791 - 2¹ = 97973789 is a prime.

Together with 97973789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97973731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48986895 + 48986896.

It is an arithmetic number, because the mean of its divisors is an integer number (48986896).

Almost surely, 2^97973791 is an apocalyptic number.

97973791 is a deficient number, since it is larger than the sum of its proper divisors (1).

97973791 is an equidigital number, since it uses as much as digits as its factorization.

97973791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750141, while the sum is 52.

The square root of 97973791 is about 9898.1710936920. The cubic root of 97973791 is about 461.0025252268.

The spelling of 97973791 in words is "ninety-seven million, nine hundred seventy-three thousand, seven hundred ninety-one".