79405489 has 2 divisors, whose sum is σ = 79405490. Its totient is φ = 79405488.

The previous prime is 79405471. The next prime is 79405511. The reversal of 79405489 is 98450497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 26697889 = 7260^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 79405489 - 2⁵ = 79405457 is a prime.

It is not a weakly prime, because it can be changed into another prime (79405409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39702744 + 39702745.

It is an arithmetic number, because the mean of its divisors is an integer number (39702745).

Almost surely, 2^79405489 is an apocalyptic number.

It is an amenable number.

79405489 is a deficient number, since it is larger than the sum of its proper divisors (1).

79405489 is an equidigital number, since it uses as much as digits as its factorization.

79405489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 79405489 is about 8910.9757602633. The cubic root of 79405489 is about 429.8169204394.

The spelling of 79405489 in words is "seventy-nine million, four hundred five thousand, four hundred eighty-nine".