794805781 has 16 divisors (see below), whose sum is σ = 992170368. Its totient is φ = 618552000.

The previous prime is 794805763. The next prime is 794805793. The reversal of 794805781 is 187508497.

It is a de Polignac number, because none of the positive numbers 2^k-794805781 is a prime.

It is a super-2 number, since 2×794805781² = 1263432459022039922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (794805721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59631 + ... + 71731.

It is an arithmetic number, because the mean of its divisors is an integer number (62010648).

Almost surely, 2^794805781 is an apocalyptic number.

It is an amenable number.

794805781 is a deficient number, since it is larger than the sum of its proper divisors (197364587).

794805781 is a wasteful number, since it uses less digits than its factorization.

794805781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12972.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 794805781 is about 28192.3000303274. The cubic root of 794805781 is about 926.3042836421.

The spelling of 794805781 in words is "seven hundred ninety-four million, eight hundred five thousand, seven hundred eighty-one".