867520791 has 12 divisors (see below), whose sum is σ = 1319037720. Its totient is φ = 547907760.

The previous prime is 867520781. The next prime is 867520793. The reversal of 867520791 is 197025768.

It is not a de Polignac number, because 867520791 - 2²⁷ = 733303063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867520793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2536440 + ... + 2536781.

It is an arithmetic number, because the mean of its divisors is an integer number (109919810).

Almost surely, 2^867520791 is an apocalyptic number.

867520791 is a deficient number, since it is larger than the sum of its proper divisors (451516929).

867520791 is a wasteful number, since it uses less digits than its factorization.

867520791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073246 (or 5073243 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 867520791 is about 29453.7058958631. The cubic root of 867520791 is about 953.7326063886.

The spelling of 867520791 in words is "eight hundred sixty-seven million, five hundred twenty thousand, seven hundred ninety-one".