771938013 has 36 divisors (see below), whose sum is σ = 1316061600. Its totient is φ = 400997520.

The previous prime is 771938003. The next prime is 771938017. The reversal of 771938013 is 310839177.

It is a happy number.

It is not a de Polignac number, because 771938013 - 2⁴ = 771937997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771938017) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3913 + ... + 39486.

Almost surely, 2^771938013 is an apocalyptic number.

It is an amenable number.

771938013 is a deficient number, since it is larger than the sum of its proper divisors (544123587).

771938013 is a wasteful number, since it uses less digits than its factorization.

771938013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43438 (or 43420 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 771938013 is about 27783.7724760336. The cubic root of 771938013 is about 917.3339692194. Note that the first 3 decimals are identical.

The spelling of 771938013 in words is "seven hundred seventy-one million, nine hundred thirty-eight thousand, thirteen".