674427779 has 2 divisors, whose sum is σ = 674427780. Its totient is φ = 674427778.

The previous prime is 674427763. The next prime is 674427821. The reversal of 674427779 is 977724476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 674427779 - 2⁴ = 674427763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 674427779.

It is not a weakly prime, because it can be changed into another prime (674427709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337213889 + 337213890.

It is an arithmetic number, because the mean of its divisors is an integer number (337213890).

Almost surely, 2^674427779 is an apocalyptic number.

674427779 is a deficient number, since it is larger than the sum of its proper divisors (1).

674427779 is an equidigital number, since it uses as much as digits as its factorization.

674427779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 53.

The square root of 674427779 is about 25969.7473803655. The cubic root of 674427779 is about 876.9573722220.

The spelling of 674427779 in words is "six hundred seventy-four million, four hundred twenty-seven thousand, seven hundred seventy-nine".