191125999 has 2 divisors, whose sum is σ = 191126000. Its totient is φ = 191125998.

The previous prime is 191125967. The next prime is 191126029. The reversal of 191125999 is 999521191.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191125999 - 2⁵ = 191125967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191125499) 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, 95562999 + 95563000.

It is an arithmetic number, because the mean of its divisors is an integer number (95563000).

Almost surely, 2^191125999 is an apocalyptic number.

191125999 is a deficient number, since it is larger than the sum of its proper divisors (1).

191125999 is an equidigital number, since it uses as much as digits as its factorization.

191125999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 46.

The square root of 191125999 is about 13824.8326933819. The cubic root of 191125999 is about 576.0231301395.

The spelling of 191125999 in words is "one hundred ninety-one million, one hundred twenty-five thousand, nine hundred ninety-nine".