190511997 has 8 divisors (see below), whose sum is σ = 273555744. Its totient is φ = 117238128.

The previous prime is 190511989. The next prime is 190512017. The reversal of 190511997 is 799115091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190511997 - 2³ = 190511989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190512997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442423 + ... + 2442500.

It is an arithmetic number, because the mean of its divisors is an integer number (34194468).

Almost surely, 2^190511997 is an apocalyptic number.

It is an amenable number.

190511997 is a deficient number, since it is larger than the sum of its proper divisors (83043747).

190511997 is a wasteful number, since it uses less digits than its factorization.

190511997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884939.

The product of its (nonzero) digits is 25515, while the sum is 42.

The square root of 190511997 is about 13802.6083404551. The cubic root of 190511997 is about 575.4056338790.

The spelling of 190511997 in words is "one hundred ninety million, five hundred eleven thousand, nine hundred ninety-seven".