89566649 has 2 divisors, whose sum is σ = 89566650. Its totient is φ = 89566648.

The previous prime is 89566621. The next prime is 89566651. The reversal of 89566649 is 94666598.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 2050624 = 9355^2 + 1432^2 .

It is a cyclic number.

It is not a de Polignac number, because 89566649 - 2¹² = 89562553 is a prime.

It is a super-2 number, since 2×89566649² = 16044369226178402, which contains 22 as substring.

Together with 89566651, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89566649.

It is not a weakly prime, because it can be changed into another prime (89566619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44783324 + 44783325.

It is an arithmetic number, because the mean of its divisors is an integer number (44783325).

Almost surely, 2^89566649 is an apocalyptic number.

It is an amenable number.

89566649 is a deficient number, since it is larger than the sum of its proper divisors (1).

89566649 is an equidigital number, since it uses as much as digits as its factorization.

89566649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The square root of 89566649 is about 9463.9658177743. The cubic root of 89566649 is about 447.4200500097.

The spelling of 89566649 in words is "eighty-nine million, five hundred sixty-six thousand, six hundred forty-nine".