779795945 has 4 divisors (see below), whose sum is σ = 935755140. Its totient is φ = 623836752.

The previous prime is 779795923. The next prime is 779795953. The reversal of 779795945 is 549597977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549597977 = 31 ⋅17728967.

It can be written as a sum of positive squares in 2 ways, for example, as 500103769 + 279692176 = 22363^2 + 16724^2 .

It is a cyclic number.

It is not a de Polignac number, because 779795945 - 2⁸ = 779795689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77979590 + ... + 77979599.

It is an arithmetic number, because the mean of its divisors is an integer number (233938785).

Almost surely, 2^779795945 is an apocalyptic number.

It is an amenable number.

779795945 is a deficient number, since it is larger than the sum of its proper divisors (155959195).

779795945 is a wasteful number, since it uses less digits than its factorization.

779795945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155959194.

The product of its digits is 25004700, while the sum is 62.

The square root of 779795945 is about 27924.8266780655. The cubic root of 779795945 is about 920.4361294662.

The spelling of 779795945 in words is "seven hundred seventy-nine million, seven hundred ninety-five thousand, nine hundred forty-five".