189628877 has 2 divisors, whose sum is σ = 189628878. Its totient is φ = 189628876.

The previous prime is 189628853. The next prime is 189628903. The reversal of 189628877 is 778826981.

189628877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97199881 + 92428996 = 9859^2 + 9614^2 .

It is a cyclic number.

It is not a de Polignac number, because 189628877 - 2¹⁸ = 189366733 is a prime.

It is a super-2 number, since 2×189628877² = 71918221984562258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189628837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94814438 + 94814439.

It is an arithmetic number, because the mean of its divisors is an integer number (94814439).

Almost surely, 2^189628877 is an apocalyptic number.

It is an amenable number.

189628877 is a deficient number, since it is larger than the sum of its proper divisors (1).

189628877 is an equidigital number, since it uses as much as digits as its factorization.

189628877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 56.

The square root of 189628877 is about 13770.5801257609. The cubic root of 189628877 is about 574.5151572667.

The spelling of 189628877 in words is "one hundred eighty-nine million, six hundred twenty-eight thousand, eight hundred seventy-seven".