97199919 has 10 divisors (see below), whose sum is σ = 145200000. Its totient is φ = 64799892.

The previous prime is 97199857. The next prime is 97199929. The reversal of 97199919 is 91999179.

It is not a de Polignac number, because 97199919 - 2¹¹ = 97197871 is a prime.

It is a super-2 number, since 2×97199919² = 18895648507213122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97199929) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 599919 + ... + 600080.

It is an arithmetic number, because the mean of its divisors is an integer number (14520000).

Almost surely, 2^97199919 is an apocalyptic number.

97199919 is a deficient number, since it is larger than the sum of its proper divisors (48000081).

97199919 is a wasteful number, since it uses less digits than its factorization.

97199919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200011 (or 1200002 counting only the distinct ones).

The product of its digits is 413343, while the sum is 54.

The square root of 97199919 is about 9859.0019271730. The cubic root of 97199919 is about 459.7855317179.

The spelling of 97199919 in words is "ninety-seven million, one hundred ninety-nine thousand, nine hundred nineteen".