191125507 has 2 divisors, whose sum is σ = 191125508. Its totient is φ = 191125506.

The previous prime is 191125499. The next prime is 191125513. The reversal of 191125507 is 705521191.

It is a strong prime.

It is an emirp because it is prime and its reverse (705521191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191125507 - 2³ = 191125499 is a prime.

It is not a weakly prime, because it can be changed into another prime (191125537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95562753 + 95562754.

It is an arithmetic number, because the mean of its divisors is an integer number (95562754).

Almost surely, 2^191125507 is an apocalyptic number.

191125507 is a deficient number, since it is larger than the sum of its proper divisors (1).

191125507 is an equidigital number, since it uses as much as digits as its factorization.

191125507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 191125507 is about 13824.8148993034. The cubic root of 191125507 is about 576.0226358694.

Adding to 191125507 its reverse (705521191), we get a palindrome (896646698).

The spelling of 191125507 in words is "one hundred ninety-one million, one hundred twenty-five thousand, five hundred seven".