89215381 has 2 divisors, whose sum is σ = 89215382. Its totient is φ = 89215380.

The previous prime is 89215369. The next prime is 89215403. The reversal of 89215381 is 18351298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 1418481 = 9370^2 + 1191^2 .

It is a cyclic number.

It is not a de Polignac number, because 89215381 - 2¹³ = 89207189 is a prime.

It is a super-2 number, since 2×89215381² = 15918768413950322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89215381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89215331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44607690 + 44607691.

It is an arithmetic number, because the mean of its divisors is an integer number (44607691).

Almost surely, 2^89215381 is an apocalyptic number.

It is an amenable number.

89215381 is a deficient number, since it is larger than the sum of its proper divisors (1).

89215381 is an equidigital number, since it uses as much as digits as its factorization.

89215381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 89215381 is about 9445.3894043602. The cubic root of 89215381 is about 446.8343771964.

The spelling of 89215381 in words is "eighty-nine million, two hundred fifteen thousand, three hundred eighty-one".