89710421 has 2 divisors, whose sum is σ = 89710422. Its totient is φ = 89710420.

The previous prime is 89710399. The next prime is 89710429. The reversal of 89710421 is 12401798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 31798321 = 7610^2 + 5639^2 .

It is a cyclic number.

It is not a de Polignac number, because 89710421 - 2²² = 85516117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89710429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44855210 + 44855211.

It is an arithmetic number, because the mean of its divisors is an integer number (44855211).

Almost surely, 2^89710421 is an apocalyptic number.

It is an amenable number.

89710421 is a deficient number, since it is larger than the sum of its proper divisors (1).

89710421 is an equidigital number, since it uses as much as digits as its factorization.

89710421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 89710421 is about 9471.5585306749. The cubic root of 89710421 is about 447.6593209435.

The spelling of 89710421 in words is "eighty-nine million, seven hundred ten thousand, four hundred twenty-one".