189134791 has 2 divisors, whose sum is σ = 189134792. Its totient is φ = 189134790.

The previous prime is 189134753. The next prime is 189134857. The reversal of 189134791 is 197431981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189134791 - 2²¹ = 187037639 is a prime.

It is a super-2 number, since 2×189134791² = 71543938333227362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189134711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94567395 + 94567396.

It is an arithmetic number, because the mean of its divisors is an integer number (94567396).

Almost surely, 2^189134791 is an apocalyptic number.

189134791 is a deficient number, since it is larger than the sum of its proper divisors (1).

189134791 is an equidigital number, since it uses as much as digits as its factorization.

189134791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 189134791 is about 13752.6285123972. The cubic root of 189134791 is about 574.0157488182.

The spelling of 189134791 in words is "one hundred eighty-nine million, one hundred thirty-four thousand, seven hundred ninety-one".