189654977 has 2 divisors, whose sum is σ = 189654978. Its totient is φ = 189654976.

The previous prime is 189654947. The next prime is 189654989. The reversal of 189654977 is 779456981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98089216 + 91565761 = 9904^2 + 9569^2 .

It is a cyclic number.

It is not a de Polignac number, because 189654977 - 2⁸ = 189654721 is a prime.

It is not a weakly prime, because it can be changed into another prime (189654937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94827488 + 94827489.

It is an arithmetic number, because the mean of its divisors is an integer number (94827489).

Almost surely, 2^189654977 is an apocalyptic number.

It is an amenable number.

189654977 is a deficient number, since it is larger than the sum of its proper divisors (1).

189654977 is an equidigital number, since it uses as much as digits as its factorization.

189654977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The square root of 189654977 is about 13771.5277656475. The cubic root of 189654977 is about 574.5415142892.

The spelling of 189654977 in words is "one hundred eighty-nine million, six hundred fifty-four thousand, nine hundred seventy-seven".