190887971 has 8 divisors (see below), whose sum is σ = 202454304. Its totient is φ = 179593920.

The previous prime is 190887967. The next prime is 190888007. The reversal of 190887971 is 179788091.

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

It is a cyclic number.

It is not a de Polignac number, because 190887971 - 2² = 190887967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190887901) 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, 66626 + ... + 69431.

It is an arithmetic number, because the mean of its divisors is an integer number (25306788).

Almost surely, 2^190887971 is an apocalyptic number.

190887971 is a deficient number, since it is larger than the sum of its proper divisors (11566333).

190887971 is a wasteful number, since it uses less digits than its factorization.

190887971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136141.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 190887971 is about 13816.2212996173. The cubic root of 190887971 is about 575.7839047202.

The spelling of 190887971 in words is "one hundred ninety million, eight hundred eighty-seven thousand, nine hundred seventy-one".