797781 has 8 divisors (see below), whose sum is σ = 1067904. Its totient is φ = 529760.

The previous prime is 797773. The next prime is 797813. The reversal of 797781 is 187797.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 797781 - 2³ = 797773 is a prime.

It is a super-2 number, since 2×797781² = 1272909047922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797701) 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, 985 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (133488).

2⁷⁹⁷⁷⁸¹ is an apocalyptic number.

It is an amenable number.

797781 is a deficient number, since it is larger than the sum of its proper divisors (270123).

797781 is a wasteful number, since it uses less digits than its factorization.

797781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 24696, while the sum is 39.

The square root of 797781 is about 893.1858709138. The cubic root of 797781 is about 92.7458664786.

The spelling of 797781 in words is "seven hundred ninety-seven thousand, seven hundred eighty-one".