189172772 has 6 divisors (see below), whose sum is σ = 331052358. Its totient is φ = 94586384.

The previous prime is 189172727. The next prime is 189172799. The reversal of 189172772 is 277271981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 189172516 + 256 = 13754^2 + 16^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23646593 + ... + 23646600.

It is an arithmetic number, because the mean of its divisors is an integer number (55175393).

Almost surely, 2^189172772 is an apocalyptic number.

It is an amenable number.

189172772 is a deficient number, since it is larger than the sum of its proper divisors (141879586).

189172772 is a wasteful number, since it uses less digits than its factorization.

189172772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47293197 (or 47293195 counting only the distinct ones).

The product of its digits is 98784, while the sum is 44.

The square root of 189172772 is about 13754.0093063804. The cubic root of 189172772 is about 574.0541697998.

The spelling of 189172772 in words is "one hundred eighty-nine million, one hundred seventy-two thousand, seven hundred seventy-two".