309823023 has 16 divisors (see below), whose sum is σ = 420320000. Its totient is φ = 202958784.

The previous prime is 309822971. The next prime is 309823051. The reversal of 309823023 is 320328903.

It is not a de Polignac number, because 309823023 - 2¹⁴ = 309806639 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 (309823123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59478 + ... + 64476.

It is an arithmetic number, because the mean of its divisors is an integer number (26270000).

Almost surely, 2^309823023 is an apocalyptic number.

309823023 is a deficient number, since it is larger than the sum of its proper divisors (110496977).

309823023 is a wasteful number, since it uses less digits than its factorization.

309823023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 309823023 is about 17601.7903350767. The cubic root of 309823023 is about 676.6611290230.

The spelling of 309823023 in words is "three hundred nine million, eight hundred twenty-three thousand, twenty-three".