89305991 has 2 divisors, whose sum is σ = 89305992. Its totient is φ = 89305990.

The previous prime is 89305973. The next prime is 89306017. The reversal of 89305991 is 19950398.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89305991 - 2⁶ = 89305927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89305921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44652995 + 44652996.

It is an arithmetic number, because the mean of its divisors is an integer number (44652996).

Almost surely, 2^89305991 is an apocalyptic number.

89305991 is a deficient number, since it is larger than the sum of its proper divisors (1).

89305991 is an equidigital number, since it uses as much as digits as its factorization.

89305991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 89305991 is about 9450.1847071896. The cubic root of 89305991 is about 446.9855991170.

The spelling of 89305991 in words is "eighty-nine million, three hundred five thousand, nine hundred ninety-one".