97997923 has 2 divisors, whose sum is σ = 97997924. Its totient is φ = 97997922.

The previous prime is 97997897. The next prime is 97997951. The reversal of 97997923 is 32979979.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97997923 is a prime.

It is not a weakly prime, because it can be changed into another prime (97997323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48998961 + 48998962.

It is an arithmetic number, because the mean of its divisors is an integer number (48998962).

Almost surely, 2^97997923 is an apocalyptic number.

97997923 is a deficient number, since it is larger than the sum of its proper divisors (1).

97997923 is an equidigital number, since it uses as much as digits as its factorization.

97997923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1928934, while the sum is 55.

The square root of 97997923 is about 9899.3900317141. The cubic root of 97997923 is about 461.0403720821.

The spelling of 97997923 in words is "ninety-seven million, nine hundred ninety-seven thousand, nine hundred twenty-three".