97185919 has 2 divisors, whose sum is σ = 97185920. Its totient is φ = 97185918.

The previous prime is 97185883. The next prime is 97185943. The reversal of 97185919 is 91958179.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97185919 - 2²⁵ = 63631487 is a prime.

It is a super-2 number, since 2×97185919² = 18890205703749122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97185619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48592959 + 48592960.

It is an arithmetic number, because the mean of its divisors is an integer number (48592960).

Almost surely, 2^97185919 is an apocalyptic number.

97185919 is a deficient number, since it is larger than the sum of its proper divisors (1).

97185919 is an equidigital number, since it uses as much as digits as its factorization.

97185919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 49.

The square root of 97185919 is about 9858.2918905863. The cubic root of 97185919 is about 459.7634558884.

The spelling of 97185919 in words is "ninety-seven million, one hundred eighty-five thousand, nine hundred nineteen".