89939221 has 2 divisors, whose sum is σ = 89939222. Its totient is φ = 89939220.

The previous prime is 89939219. The next prime is 89939243. The reversal of 89939221 is 12293998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56415121 + 33524100 = 7511^2 + 5790^2 .

It is a cyclic number.

It is not a de Polignac number, because 89939221 - 2¹ = 89939219 is a prime.

Together with 89939219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89939621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44969610 + 44969611.

It is an arithmetic number, because the mean of its divisors is an integer number (44969611).

Almost surely, 2^89939221 is an apocalyptic number.

It is an amenable number.

89939221 is a deficient number, since it is larger than the sum of its proper divisors (1).

89939221 is an equidigital number, since it uses as much as digits as its factorization.

89939221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 89939221 is about 9483.6291049366. The cubic root of 89939221 is about 448.0395721980.

The spelling of 89939221 in words is "eighty-nine million, nine hundred thirty-nine thousand, two hundred twenty-one".