1312773394 has 8 divisors (see below), whose sum is σ = 2022380748. Its totient is φ = 638646480.

The previous prime is 1312773391. The next prime is 1312773463. The reversal of 1312773394 is 4933772131.

It can be written as a sum of positive squares in 2 ways, for example, as 1305882769 + 6890625 = 36137^2 + 2625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1312773391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8870017 + ... + 8870164.

Almost surely, 2^1312773394 is an apocalyptic number.

1312773394 is a deficient number, since it is larger than the sum of its proper divisors (709607354).

1312773394 is a wasteful number, since it uses less digits than its factorization.

1312773394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17740220.

The product of its digits is 95256, while the sum is 40.

The square root of 1312773394 is about 36232.2148646753. The cubic root of 1312773394 is about 1094.9558009168.

The spelling of 1312773394 in words is "one billion, three hundred twelve million, seven hundred seventy-three thousand, three hundred ninety-four".