79474477 has 2 divisors, whose sum is σ = 79474478. Its totient is φ = 79474476.

The previous prime is 79474469. The next prime is 79474481. The reversal of 79474477 is 77447497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51108201 + 28366276 = 7149^2 + 5326^2 .

It is an emirp because it is prime and its reverse (77447497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79474477 - 2³ = 79474469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79474477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79474427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39737238 + 39737239.

It is an arithmetic number, because the mean of its divisors is an integer number (39737239).

Almost surely, 2^79474477 is an apocalyptic number.

It is an amenable number.

79474477 is a deficient number, since it is larger than the sum of its proper divisors (1).

79474477 is an equidigital number, since it uses as much as digits as its factorization.

79474477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 49.

The square root of 79474477 is about 8914.8458764019. The cubic root of 79474477 is about 429.9413603108.

The spelling of 79474477 in words is "seventy-nine million, four hundred seventy-four thousand, four hundred seventy-seven".