189779377 has 2 divisors, whose sum is σ = 189779378. Its totient is φ = 189779376.

The previous prime is 189779297. The next prime is 189779389. The reversal of 189779377 is 773977981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178462881 + 11316496 = 13359^2 + 3364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189779377 is a prime.

It is not a weakly prime, because it can be changed into another prime (189779477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94889688 + 94889689.

It is an arithmetic number, because the mean of its divisors is an integer number (94889689).

Almost surely, 2^189779377 is an apocalyptic number.

It is an amenable number.

189779377 is a deficient number, since it is larger than the sum of its proper divisors (1).

189779377 is an equidigital number, since it uses as much as digits as its factorization.

189779377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4667544, while the sum is 58.

The square root of 189779377 is about 13776.0435902330. The cubic root of 189779377 is about 574.6671061124.

The spelling of 189779377 in words is "one hundred eighty-nine million, seven hundred seventy-nine thousand, three hundred seventy-seven".