99575891 has 2 divisors, whose sum is σ = 99575892. Its totient is φ = 99575890.

The previous prime is 99575887. The next prime is 99575899. The reversal of 99575891 is 19857599.

It is a weak prime.

It is an emirp because it is prime and its reverse (19857599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99575891 - 2² = 99575887 is a prime.

It is not a weakly prime, because it can be changed into another prime (99575899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49787945 + 49787946.

It is an arithmetic number, because the mean of its divisors is an integer number (49787946).

Almost surely, 2^99575891 is an apocalyptic number.

99575891 is a deficient number, since it is larger than the sum of its proper divisors (1).

99575891 is an equidigital number, since it uses as much as digits as its factorization.

99575891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 53.

The square root of 99575891 is about 9978.7720186404. The cubic root of 99575891 is about 463.5017736639.

The spelling of 99575891 in words is "ninety-nine million, five hundred seventy-five thousand, eight hundred ninety-one".