188910497 has 12 divisors (see below), whose sum is σ = 198937620. Its totient is φ = 179318880.

The previous prime is 188910487. The next prime is 188910499. The reversal of 188910497 is 794019881.

It can be written as a sum of positive squares in 2 ways, for example, as 92948881 + 95961616 = 9641^2 + 9796^2 .

It is not a de Polignac number, because 188910497 - 2⁶ = 188910433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188910499) 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, 49079 + ... + 52787.

It is an arithmetic number, because the mean of its divisors is an integer number (16578135).

Almost surely, 2^188910497 is an apocalyptic number.

It is an amenable number.

188910497 is a deficient number, since it is larger than the sum of its proper divisors (10027123).

188910497 is an equidigital number, since it uses as much as digits as its factorization.

188910497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3793 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 188910497 is about 13744.4715067550. The cubic root of 188910497 is about 573.7887515971.

The spelling of 188910497 in words is "one hundred eighty-eight million, nine hundred ten thousand, four hundred ninety-seven".