189819677 has 2 divisors, whose sum is σ = 189819678. Its totient is φ = 189819676.

The previous prime is 189819653. The next prime is 189819683. The reversal of 189819677 is 776918981.

189819677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130622041 + 59197636 = 11429^2 + 7694^2 .

It is a cyclic number.

It is not a de Polignac number, because 189819677 - 2²⁴ = 173042461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189819647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94909838 + 94909839.

It is an arithmetic number, because the mean of its divisors is an integer number (94909839).

Almost surely, 2^189819677 is an apocalyptic number.

It is an amenable number.

189819677 is a deficient number, since it is larger than the sum of its proper divisors (1).

189819677 is an equidigital number, since it uses as much as digits as its factorization.

189819677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 56.

The square root of 189819677 is about 13777.5061966961. The cubic root of 189819677 is about 574.7077804394.

The spelling of 189819677 in words is "one hundred eighty-nine million, eight hundred nineteen thousand, six hundred seventy-seven".