89820079 has 2 divisors, whose sum is σ = 89820080. Its totient is φ = 89820078.

The previous prime is 89819987. The next prime is 89820089. The reversal of 89820079 is 97002898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89820079 - 2⁹ = 89819567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89820089) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44910039 + 44910040.

It is an arithmetic number, because the mean of its divisors is an integer number (44910040).

Almost surely, 2^89820079 is an apocalyptic number.

89820079 is a deficient number, since it is larger than the sum of its proper divisors (1).

89820079 is an equidigital number, since it uses as much as digits as its factorization.

89820079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 89820079 is about 9477.3455671934. The cubic root of 89820079 is about 447.8416462418.

The spelling of 89820079 in words is "eighty-nine million, eight hundred twenty thousand, seventy-nine".