190389874 has 4 divisors (see below), whose sum is σ = 285584814. Its totient is φ = 95194936.

The previous prime is 190389863. The next prime is 190389877. The reversal of 190389874 is 478983091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478983091 = 389 ⋅1231319.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 51739249 = 11775^2 + 7193^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (190389877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47597467 + ... + 47597470.

Almost surely, 2^190389874 is an apocalyptic number.

190389874 is a deficient number, since it is larger than the sum of its proper divisors (95194940).

190389874 is an equidigital number, since it uses as much as digits as its factorization.

190389874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95194939.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 190389874 is about 13798.1837210555. The cubic root of 190389874 is about 575.2826577521.

The spelling of 190389874 in words is "one hundred ninety million, three hundred eighty-nine thousand, eight hundred seventy-four".