1023997 has 8 divisors (see below), whose sum is σ = 1110816. Its totient is φ = 938352.

The previous prime is 1023991. The next prime is 1024021. The reversal of 1023997 is 7993201.

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 1023997 - 2¹⁵ = 991229 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 (1023991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2778 + ... + 3124.

It is an arithmetic number, because the mean of its divisors is an integer number (138852).

2^1023997 is an apocalyptic number.

It is an amenable number.

1023997 is a deficient number, since it is larger than the sum of its proper divisors (86819).

1023997 is a wasteful number, since it uses less digits than its factorization.

1023997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1023997 is about 1011.9273689351. The cubic root of 1023997 is about 100.7935855602.

The spelling of 1023997 in words is "one million, twenty-three thousand, nine hundred ninety-seven".