189743965 has 4 divisors (see below), whose sum is σ = 227692764. Its totient is φ = 151795168.

The previous prime is 189743959. The next prime is 189744001. The reversal of 189743965 is 569347981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79619929 + 110124036 = 8923^2 + 10494^2 .

It is a cyclic number.

It is not a de Polignac number, because 189743965 - 2¹⁷ = 189612893 is a prime.

It is a Duffinian number.

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, 18974392 + ... + 18974401.

It is an arithmetic number, because the mean of its divisors is an integer number (56923191).

Almost surely, 2^189743965 is an apocalyptic number.

It is an amenable number.

189743965 is a deficient number, since it is larger than the sum of its proper divisors (37948799).

189743965 is an equidigital number, since it uses as much as digits as its factorization.

189743965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37948798.

The product of its digits is 1632960, while the sum is 52.

The square root of 189743965 is about 13774.7582555920. The cubic root of 189743965 is about 574.6313604345.

The spelling of 189743965 in words is "one hundred eighty-nine million, seven hundred forty-three thousand, nine hundred sixty-five".