770978794 has 4 divisors (see below), whose sum is σ = 1156468194. Its totient is φ = 385489396.

The previous prime is 770978779. The next prime is 770978807. The reversal of 770978794 is 497879077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497879077 = 67 ⋅7431031.

It can be written as a sum of positive squares in only one way, i.e., 749938225 + 21040569 = 27385^2 + 4587^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192744697 + ... + 192744700.

Almost surely, 2^770978794 is an apocalyptic number.

770978794 is a deficient number, since it is larger than the sum of its proper divisors (385489400).

770978794 is a wasteful number, since it uses less digits than its factorization.

770978794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385489399.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The square root of 770978794 is about 27766.5048934863. The cubic root of 770978794 is about 916.9538485026.

The spelling of 770978794 in words is "seven hundred seventy million, nine hundred seventy-eight thousand, seven hundred ninety-four".