783997 has 4 divisors (see below), whose sum is σ = 825280. Its totient is φ = 742716.

The previous prime is 783953. The next prime is 784009. The reversal of 783997 is 799387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799387 = 19 ⋅42073.

It is a cyclic number.

It is not a de Polignac number, because 783997 - 2⁷ = 783869 is a prime.

It is a super-2 number, since 2×783997² = 1229302592018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20613 + ... + 20650.

It is an arithmetic number, because the mean of its divisors is an integer number (206320).

2⁷⁸³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

783997 is a deficient number, since it is larger than the sum of its proper divisors (41283).

783997 is a wasteful number, since it uses less digits than its factorization.

783997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41282.

The product of its digits is 95256, while the sum is 43.

The square root of 783997 is about 885.4360507682. The cubic root of 783997 is about 92.2086082278.

The spelling of 783997 in words is "seven hundred eighty-three thousand, nine hundred ninety-seven".