189310081 has 3 divisors (see below), whose sum is σ = 189323841. Its totient is φ = 189296322.

The previous prime is 189310063. The next prime is 189310103. The reversal of 189310081 is 180013981.

The square root of 189310081 is 13759.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 189310081 - 2¹⁵ = 189277313 is a prime.

It is a super-2 number, since 2×189310081² = 71676613536453122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189310021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6880 + ... + 20638.

It is an arithmetic number, because the mean of its divisors is an integer number (63107947).

Almost surely, 2^189310081 is an apocalyptic number.

189310081 is the 13759-th square number.

189310081 is the 6880-th centered octagonal number.

It is an amenable number.

189310081 is a deficient number, since it is larger than the sum of its proper divisors (13760).

189310081 is an frugal number, since it uses more digits than its factorization.

189310081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27518 (or 13759 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The cubic root of 189310081 is about 574.1930265355.

The spelling of 189310081 in words is "one hundred eighty-nine million, three hundred ten thousand, eighty-one".