89758661 has 2 divisors, whose sum is σ = 89758662. Its totient is φ = 89758660.

The previous prime is 89758651. The next prime is 89758663. The reversal of 89758661 is 16685798.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67338436 + 22420225 = 8206^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 89758661 - 2⁶ = 89758597 is a prime.

Together with 89758663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89758663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44879330 + 44879331.

It is an arithmetic number, because the mean of its divisors is an integer number (44879331).

Almost surely, 2^89758661 is an apocalyptic number.

It is an amenable number.

89758661 is a deficient number, since it is larger than the sum of its proper divisors (1).

89758661 is an equidigital number, since it uses as much as digits as its factorization.

89758661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 89758661 is about 9474.1047598177. The cubic root of 89758661 is about 447.7395465396.

The spelling of 89758661 in words is "eighty-nine million, seven hundred fifty-eight thousand, six hundred sixty-one".