89947579 has 2 divisors, whose sum is σ = 89947580. Its totient is φ = 89947578.

The previous prime is 89947547. The next prime is 89947591. The reversal of 89947579 is 97574998.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89947579 - 2⁵ = 89947547 is a prime.

It is a super-2 number, since 2×89947579² = 16181133935922482, which contains 22 as substring.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 89947579 parts by 13412 straight cuts.

It is not a weakly prime, because it can be changed into another prime (89947279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44973789 + 44973790.

It is an arithmetic number, because the mean of its divisors is an integer number (44973790).

Almost surely, 2^89947579 is an apocalyptic number.

89947579 is a deficient number, since it is larger than the sum of its proper divisors (1).

89947579 is an equidigital number, since it uses as much as digits as its factorization.

89947579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 58.

The square root of 89947579 is about 9484.0697487946. The cubic root of 89947579 is about 448.0534504546.

The spelling of 89947579 in words is "eighty-nine million, nine hundred forty-seven thousand, five hundred seventy-nine".