791987 has 8 divisors (see below), whose sum is σ = 924000. Its totient is φ = 678552.

The previous prime is 791971. The next prime is 791993. The reversal of 791987 is 789197.

791987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 791987 - 2⁴ = 791971 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 791987.

It is not an unprimeable number, because it can be changed into a prime (791927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (115500).

2⁷⁹¹⁹⁸⁷ is an apocalyptic number.

791987 is a deficient number, since it is larger than the sum of its proper divisors (132013).

791987 is an equidigital number, since it uses as much as digits as its factorization.

791987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330 (or 2316 counting only the distinct ones).

The product of its digits is 31752, while the sum is 41.

The square root of 791987 is about 889.9365145897. The cubic root of 791987 is about 92.5207939617.

The spelling of 791987 in words is "seven hundred ninety-one thousand, nine hundred eighty-seven".