190630891 has 8 divisors (see below), whose sum is σ = 215132400. Its totient is φ = 167324640.

The previous prime is 190630889. The next prime is 190630897. The reversal of 190630891 is 198036091.

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 190630891 - 2¹ = 190630889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190630891.

It is not an unprimeable number, because it can be changed into a prime (190630897) 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, 298476 + ... + 299113.

It is an arithmetic number, because the mean of its divisors is an integer number (26891550).

Almost surely, 2^190630891 is an apocalyptic number.

190630891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190630891 is a deficient number, since it is larger than the sum of its proper divisors (24501509).

190630891 is a wasteful number, since it uses less digits than its factorization.

190630891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597629.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 190630891 is about 13806.9146082678. The cubic root of 190630891 is about 575.5253079712.

The spelling of 190630891 in words is "one hundred ninety million, six hundred thirty thousand, eight hundred ninety-one".