89975579 has 2 divisors, whose sum is σ = 89975580. Its totient is φ = 89975578.

The previous prime is 89975539. The next prime is 89975591. The reversal of 89975579 is 97557998.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89975579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89975519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44987789 + 44987790.

It is an arithmetic number, because the mean of its divisors is an integer number (44987790).

Almost surely, 2^89975579 is an apocalyptic number.

89975579 is a deficient number, since it is larger than the sum of its proper divisors (1).

89975579 is an equidigital number, since it uses as much as digits as its factorization.

89975579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 59.

The square root of 89975579 is about 9485.5457934691. The cubic root of 89975579 is about 448.0999375129.

The spelling of 89975579 in words is "eighty-nine million, nine hundred seventy-five thousand, five hundred seventy-nine".