189116251 has 2 divisors, whose sum is σ = 189116252. Its totient is φ = 189116250.

The previous prime is 189116237. The next prime is 189116269. The reversal of 189116251 is 152611981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189116251 - 2⁵ = 189116219 is a prime.

It is not a weakly prime, because it can be changed into another prime (189116351) 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, 94558125 + 94558126.

It is an arithmetic number, because the mean of its divisors is an integer number (94558126).

Almost surely, 2^189116251 is an apocalyptic number.

189116251 is a deficient number, since it is larger than the sum of its proper divisors (1).

189116251 is an equidigital number, since it uses as much as digits as its factorization.

189116251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 34.

The square root of 189116251 is about 13751.9544429147. The cubic root of 189116251 is about 573.9969921779.

The spelling of 189116251 in words is "one hundred eighty-nine million, one hundred sixteen thousand, two hundred fifty-one".