999047023 has 4 divisors (see below), whose sum is σ = 1075896808. Its totient is φ = 922197240.

The previous prime is 999046991. The next prime is 999047111. The reversal of 999047023 is 320740999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320740999 = 43 ⋅7459093.

It is a cyclic number.

It is not a de Polignac number, because 999047023 - 2⁵ = 999046991 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 (999047923) 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, 38424873 + ... + 38424898.

It is an arithmetic number, because the mean of its divisors is an integer number (268974202).

Almost surely, 2^999047023 is an apocalyptic number.

999047023 is a deficient number, since it is larger than the sum of its proper divisors (76849785).

999047023 is a wasteful number, since it uses less digits than its factorization.

999047023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76849784.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 999047023 is about 31607.7051207455. The cubic root of 999047023 is about 999.6822400393.

The spelling of 999047023 in words is "nine hundred ninety-nine million, forty-seven thousand, twenty-three".