999997023 has 8 divisors (see below), whose sum is σ = 1338518448. Its totient is φ = 664070144.

The previous prime is 999997021. The next prime is 999997049. The reversal of 999997023 is 320799999.

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 999997023 - 2¹ = 999997021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999997021) 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, 647736 + ... + 649277.

It is an arithmetic number, because the mean of its divisors is an integer number (167314806).

Almost surely, 2^999997023 is an apocalyptic number.

999997023 is a deficient number, since it is larger than the sum of its proper divisors (338521425).

999997023 is a wasteful number, since it uses less digits than its factorization.

999997023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297273.

The product of its (nonzero) digits is 2480058, while the sum is 57.

The square root of 999997023 is about 31622.7295311458. The cubic root of 999997023 is about 999.9990076657. Note that the first 3 decimals are identical.

The spelling of 999997023 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, twenty-three".