189267961 has 2 divisors, whose sum is σ = 189267962. Its totient is φ = 189267960.

The previous prime is 189267901. The next prime is 189267979. The reversal of 189267961 is 169762981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166410000 + 22857961 = 12900^2 + 4781^2 .

It is a cyclic number.

It is not a de Polignac number, because 189267961 - 2²³ = 180879353 is a prime.

It is a super-2 number, since 2×189267961² = 71644722122195042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189267901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94633980 + 94633981.

It is an arithmetic number, because the mean of its divisors is an integer number (94633981).

Almost surely, 2^189267961 is an apocalyptic number.

It is an amenable number.

189267961 is a deficient number, since it is larger than the sum of its proper divisors (1).

189267961 is an equidigital number, since it uses as much as digits as its factorization.

189267961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 189267961 is about 13757.4692803582. The cubic root of 189267961 is about 574.1504389035.

The spelling of 189267961 in words is "one hundred eighty-nine million, two hundred sixty-seven thousand, nine hundred sixty-one".