190768819 has 4 divisors (see below), whose sum is σ = 191086840. Its totient is φ = 190450800.

The previous prime is 190768813. The next prime is 190768829. The reversal of 190768819 is 918867091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918867091 = 79 ⋅11631229.

It is a cyclic number.

It is not a de Polignac number, because 190768819 - 2³ = 190768811 is a prime.

It is a super-2 number, since 2×190768819² = 72785484605309522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190768811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158109 + ... + 159310.

It is an arithmetic number, because the mean of its divisors is an integer number (47771710).

Almost surely, 2^190768819 is an apocalyptic number.

190768819 is a deficient number, since it is larger than the sum of its proper divisors (318021).

190768819 is an equidigital number, since it uses as much as digits as its factorization.

190768819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318020.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 190768819 is about 13811.9085936738. The cubic root of 190768819 is about 575.6640786202.

The spelling of 190768819 in words is "one hundred ninety million, seven hundred sixty-eight thousand, eight hundred nineteen".