189477965 has 4 divisors (see below), whose sum is σ = 227373564. Its totient is φ = 151582368.

The previous prime is 189477947. The next prime is 189477973. The reversal of 189477965 is 569774981.

189477965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569774981 = 173 ⋅3293497.

It can be written as a sum of positive squares in 2 ways, for example, as 20529961 + 168948004 = 4531^2 + 12998^2 .

It is a cyclic number.

It is not a de Polignac number, because 189477965 - 2⁶ = 189477901 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 189477965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18947792 + ... + 18947801.

It is an arithmetic number, because the mean of its divisors is an integer number (56843391).

Almost surely, 2^189477965 is an apocalyptic number.

It is an amenable number.

189477965 is a deficient number, since it is larger than the sum of its proper divisors (37895599).

189477965 is an equidigital number, since it uses as much as digits as its factorization.

189477965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37895598.

The product of its digits is 3810240, while the sum is 56.

The square root of 189477965 is about 13765.0995274281. The cubic root of 189477965 is about 574.3627117062.

The spelling of 189477965 in words is "one hundred eighty-nine million, four hundred seventy-seven thousand, nine hundred sixty-five".