97997971 has 2 divisors, whose sum is σ = 97997972. Its totient is φ = 97997970.

The previous prime is 97997969. The next prime is 97998001. The reversal of 97997971 is 17979979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97997971 - 2¹ = 97997969 is a prime.

Together with 97997969, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97997951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48998985 + 48998986.

It is an arithmetic number, because the mean of its divisors is an integer number (48998986).

Almost surely, 2^97997971 is an apocalyptic number.

97997971 is a deficient number, since it is larger than the sum of its proper divisors (1).

97997971 is an equidigital number, since it uses as much as digits as its factorization.

97997971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250423, while the sum is 58.

The square root of 97997971 is about 9899.3924561056. The cubic root of 97997971 is about 461.0404473556.

The spelling of 97997971 in words is "ninety-seven million, nine hundred ninety-seven thousand, nine hundred seventy-one".