97172239 has 2 divisors, whose sum is σ = 97172240. Its totient is φ = 97172238.

The previous prime is 97172237. The next prime is 97172269. The reversal of 97172239 is 93227179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97172239 - 2¹ = 97172237 is a prime.

Together with 97172237, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5607886 and since 97172239 and 5607886 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97172237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48586119 + 48586120.

It is an arithmetic number, because the mean of its divisors is an integer number (48586120).

Almost surely, 2^97172239 is an apocalyptic number.

97172239 is a deficient number, since it is larger than the sum of its proper divisors (1).

97172239 is an equidigital number, since it uses as much as digits as its factorization.

97172239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 97172239 is about 9857.5980340040. The cubic root of 97172239 is about 459.7418826012.

The spelling of 97172239 in words is "ninety-seven million, one hundred seventy-two thousand, two hundred thirty-nine".