97191189 has 12 divisors (see below), whose sum is σ = 141778572. Its totient is φ = 64152000.

The previous prime is 97191181. The next prime is 97191217. The reversal of 97191189 is 98119179.

It can be written as a sum of positive squares in 2 ways, for example, as 92968164 + 4223025 = 9642^2 + 2055^2 .

It is not a de Polignac number, because 97191189 - 2³ = 97191181 is a prime.

It is a super-2 number, since 2×97191189² = 18892254438467442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97191181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52552 + ... + 54369.

It is an arithmetic number, because the mean of its divisors is an integer number (11814881).

Almost surely, 2^97191189 is an apocalyptic number.

It is an amenable number.

97191189 is a deficient number, since it is larger than the sum of its proper divisors (44587383).

97191189 is a wasteful number, since it uses less digits than its factorization.

97191189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107028 (or 107025 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 97191189 is about 9858.5591746462. The cubic root of 97191189 is about 459.7717661101.

The spelling of 97191189 in words is "ninety-seven million, one hundred ninety-one thousand, one hundred eighty-nine".