88809191 has 2 divisors, whose sum is σ = 88809192. Its totient is φ = 88809190.

The previous prime is 88809163. The next prime is 88809209. The reversal of 88809191 is 19190888.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88809191 is a prime.

It is a super-3 number, since 3×88809191³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88809121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44404595 + 44404596.

It is an arithmetic number, because the mean of its divisors is an integer number (44404596).

Almost surely, 2^88809191 is an apocalyptic number.

88809191 is a deficient number, since it is larger than the sum of its proper divisors (1).

88809191 is an equidigital number, since it uses as much as digits as its factorization.

88809191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 88809191 is about 9423.8628491718. The cubic root of 88809191 is about 446.1552125229.

The spelling of 88809191 in words is "eighty-eight million, eight hundred nine thousand, one hundred ninety-one".