79755589 has 2 divisors, whose sum is σ = 79755590. Its totient is φ = 79755588.

The previous prime is 79755587. The next prime is 79755593. The reversal of 79755589 is 98555797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48024900 + 31730689 = 6930^2 + 5633^2 .

It is an emirp because it is prime and its reverse (98555797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79755589 - 2¹ = 79755587 is a prime.

Together with 79755587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79755587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39877794 + 39877795.

It is an arithmetic number, because the mean of its divisors is an integer number (39877795).

Almost surely, 2^79755589 is an apocalyptic number.

It is an amenable number.

79755589 is a deficient number, since it is larger than the sum of its proper divisors (1).

79755589 is an equidigital number, since it uses as much as digits as its factorization.

79755589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969000, while the sum is 55.

The square root of 79755589 is about 8930.5984681879. The cubic root of 79755589 is about 430.4476840943.

The spelling of 79755589 in words is "seventy-nine million, seven hundred fifty-five thousand, five hundred eighty-nine".