909940023 has 12 divisors (see below), whose sum is σ = 1314623128. Its totient is φ = 606504240.

The previous prime is 909940021. The next prime is 909940049. The reversal of 909940023 is 320049909.

It is not a de Polignac number, because 909940023 - 2¹ = 909940021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 909940023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909940021) 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 11 ways as a sum of consecutive naturals, for example, 70233 + ... + 82173.

Almost surely, 2^909940023 is an apocalyptic number.

909940023 is a deficient number, since it is larger than the sum of its proper divisors (404683105).

909940023 is a wasteful number, since it uses less digits than its factorization.

909940023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 909940023 is about 30165.2121325211. The cubic root of 909940023 is about 969.0308181912.

The spelling of 909940023 in words is "nine hundred nine million, nine hundred forty thousand, twenty-three".