88505891 has 2 divisors, whose sum is σ = 88505892. Its totient is φ = 88505890.

The previous prime is 88505881. The next prime is 88505897. The reversal of 88505891 is 19850588.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88505891 is a prime.

It is not a weakly prime, because it can be changed into another prime (88505897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44252945 + 44252946.

It is an arithmetic number, because the mean of its divisors is an integer number (44252946).

Almost surely, 2^88505891 is an apocalyptic number.

88505891 is a deficient number, since it is larger than the sum of its proper divisors (1).

88505891 is an equidigital number, since it uses as much as digits as its factorization.

88505891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 88505891 is about 9407.7569590206. The cubic root of 88505891 is about 445.6467320612.

It can be divided in two parts, 8850 and 5891, that added together give a palindrome (14741).

The spelling of 88505891 in words is "eighty-eight million, five hundred five thousand, eight hundred ninety-one".