189977153 has 2 divisors, whose sum is σ = 189977154. Its totient is φ = 189977152.

The previous prime is 189977113. The next prime is 189977191. The reversal of 189977153 is 351779981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97278769 + 92698384 = 9863^2 + 9628^2 .

It is a cyclic number.

It is not a de Polignac number, because 189977153 - 2⁶ = 189977089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (189977113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94988576 + 94988577.

It is an arithmetic number, because the mean of its divisors is an integer number (94988577).

Almost surely, 2^189977153 is an apocalyptic number.

It is an amenable number.

189977153 is a deficient number, since it is larger than the sum of its proper divisors (1).

189977153 is an equidigital number, since it uses as much as digits as its factorization.

189977153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 50.

The square root of 189977153 is about 13783.2199793807. The cubic root of 189977153 is about 574.8666639793.

The spelling of 189977153 in words is "one hundred eighty-nine million, nine hundred seventy-seven thousand, one hundred fifty-three".