189318677 has 4 divisors (see below), whose sum is σ = 194435436. Its totient is φ = 184201920.

The previous prime is 189318673. The next prime is 189318691. The reversal of 189318677 is 776813981.

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 134351281 + 54967396 = 11591^2 + 7414^2 .

It is a cyclic number.

It is not a de Polignac number, because 189318677 - 2² = 189318673 is a prime.

It is a super-2 number, since 2×189318677² = 71683122922060658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189318671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558324 + ... + 2558397.

It is an arithmetic number, because the mean of its divisors is an integer number (48608859).

Almost surely, 2^189318677 is an apocalyptic number.

It is an amenable number.

189318677 is a deficient number, since it is larger than the sum of its proper divisors (5116759).

189318677 is an equidigital number, since it uses as much as digits as its factorization.

189318677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116758.

The product of its digits is 508032, while the sum is 50.

The square root of 189318677 is about 13759.3123738071. The cubic root of 189318677 is about 574.2017171953.

The spelling of 189318677 in words is "one hundred eighty-nine million, three hundred eighteen thousand, six hundred seventy-seven".