88444991 has 2 divisors, whose sum is σ = 88444992. Its totient is φ = 88444990.

The previous prime is 88444949. The next prime is 88445009. The reversal of 88444991 is 19944488.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88444991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88444901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44222495 + 44222496.

It is an arithmetic number, because the mean of its divisors is an integer number (44222496).

Almost surely, 2^88444991 is an apocalyptic number.

88444991 is a deficient number, since it is larger than the sum of its proper divisors (1).

88444991 is an equidigital number, since it uses as much as digits as its factorization.

88444991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The square root of 88444991 is about 9404.5197112878. The cubic root of 88444991 is about 445.5444936190.

The spelling of 88444991 in words is "eighty-eight million, four hundred forty-four thousand, nine hundred ninety-one".