779406142 has 4 divisors (see below), whose sum is σ = 1169109216. Its totient is φ = 389703070.

The previous prime is 779406139. The next prime is 779406143. The reversal of 779406142 is 241604977.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 779406095 and 779406104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779406143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194851534 + ... + 194851537.

It is an arithmetic number, because the mean of its divisors is an integer number (292277304).

Almost surely, 2^779406142 is an apocalyptic number.

779406142 is a deficient number, since it is larger than the sum of its proper divisors (389703074).

779406142 is a wasteful number, since it uses less digits than its factorization.

779406142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389703073.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 779406142 is about 27917.8462994551. The cubic root of 779406142 is about 920.2827352493.

The spelling of 779406142 in words is "seven hundred seventy-nine million, four hundred six thousand, one hundred forty-two".