89929661 has 2 divisors, whose sum is σ = 89929662. Its totient is φ = 89929660.

The previous prime is 89929657. The next prime is 89929673. The reversal of 89929661 is 16692998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 15452761 = 8630^2 + 3931^2 .

It is a cyclic number.

It is not a de Polignac number, because 89929661 - 2² = 89929657 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 (89929691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44964830 + 44964831.

It is an arithmetic number, because the mean of its divisors is an integer number (44964831).

Almost surely, 2^89929661 is an apocalyptic number.

It is an amenable number.

89929661 is a deficient number, since it is larger than the sum of its proper divisors (1).

89929661 is an equidigital number, since it uses as much as digits as its factorization.

89929661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 50.

The square root of 89929661 is about 9483.1250650827. The cubic root of 89929661 is about 448.0236969954.

The spelling of 89929661 in words is "eighty-nine million, nine hundred twenty-nine thousand, six hundred sixty-one".