89245021 has 2 divisors, whose sum is σ = 89245022. Its totient is φ = 89245020.

The previous prime is 89245007. The next prime is 89245031. The reversal of 89245021 is 12054298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84897796 + 4347225 = 9214^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 89245021 - 2⁷ = 89244893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89245031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44622510 + 44622511.

It is an arithmetic number, because the mean of its divisors is an integer number (44622511).

Almost surely, 2^89245021 is an apocalyptic number.

It is an amenable number.

89245021 is a deficient number, since it is larger than the sum of its proper divisors (1).

89245021 is an equidigital number, since it uses as much as digits as its factorization.

89245021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 89245021 is about 9446.9582935461. The cubic root of 89245021 is about 446.8838556023.

The spelling of 89245021 in words is "eighty-nine million, two hundred forty-five thousand, twenty-one".