189656377 has 2 divisors, whose sum is σ = 189656378. Its totient is φ = 189656376.

The previous prime is 189656351. The next prime is 189656393. The reversal of 189656377 is 773656981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152250921 + 37405456 = 12339^2 + 6116^2 .

It is an emirp because it is prime and its reverse (773656981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189656377 is a prime.

It is a super-2 number, since 2×189656377² = 71939082673532258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189656177) 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, 94828188 + 94828189.

It is an arithmetic number, because the mean of its divisors is an integer number (94828189).

Almost surely, 2^189656377 is an apocalyptic number.

It is an amenable number.

189656377 is a deficient number, since it is larger than the sum of its proper divisors (1).

189656377 is an equidigital number, since it uses as much as digits as its factorization.

189656377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 189656377 is about 13771.5785950631. The cubic root of 189656377 is about 574.5429280075.

The spelling of 189656377 in words is "one hundred eighty-nine million, six hundred fifty-six thousand, three hundred seventy-seven".