79918477 has 2 divisors, whose sum is σ = 79918478. Its totient is φ = 79918476.

The previous prime is 79918469. The next prime is 79918507. The reversal of 79918477 is 77481997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57365476 + 22553001 = 7574^2 + 4749^2 .

It is a cyclic number.

It is not a de Polignac number, because 79918477 - 2³ = 79918469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79918877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39959238 + 39959239.

It is an arithmetic number, because the mean of its divisors is an integer number (39959239).

Almost surely, 2^79918477 is an apocalyptic number.

It is an amenable number.

79918477 is a deficient number, since it is larger than the sum of its proper divisors (1).

79918477 is an equidigital number, since it uses as much as digits as its factorization.

79918477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The square root of 79918477 is about 8939.7134741556. The cubic root of 79918477 is about 430.7405249456.

The spelling of 79918477 in words is "seventy-nine million, nine hundred eighteen thousand, four hundred seventy-seven".