89979047 has 2 divisors, whose sum is σ = 89979048. Its totient is φ = 89979046.

The previous prime is 89979023. The next prime is 89979073. The reversal of 89979047 is 74097998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89979047 - 2¹⁰ = 89978023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89979047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89979007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44989523 + 44989524.

It is an arithmetic number, because the mean of its divisors is an integer number (44989524).

Almost surely, 2^89979047 is an apocalyptic number.

89979047 is a deficient number, since it is larger than the sum of its proper divisors (1).

89979047 is an equidigital number, since it uses as much as digits as its factorization.

89979047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 89979047 is about 9485.7285961596. The cubic root of 89979047 is about 448.1056945959.

Adding to 89979047 its product of nonzero digits (1143072), we get a palindrome (91122119).

The spelling of 89979047 in words is "eighty-nine million, nine hundred seventy-nine thousand, forty-seven".