780997 has 8 divisors (see below), whose sum is σ = 945216. Its totient is φ = 629952.

The previous prime is 780991. The next prime is 781003. The reversal of 780997 is 799087.

It is an interprime number because it is at equal distance from previous prime (780991) and next prime (781003).

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

It is not a de Polignac number, because 780997 - 2⁷ = 780869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780991) 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, 3163 + ... + 3400.

It is an arithmetic number, because the mean of its divisors is an integer number (118152).

2⁷⁸⁰⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

780997 is a deficient number, since it is larger than the sum of its proper divisors (164219).

780997 is a wasteful number, since it uses less digits than its factorization.

780997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 780997 is about 883.7403464819. The cubic root of 780997 is about 92.0908444196.

The spelling of 780997 in words is "seven hundred eighty thousand, nine hundred ninety-seven".