909023121 has 16 divisors (see below), whose sum is σ = 1347371520. Its totient is φ = 605713680.

The previous prime is 909023117. The next prime is 909023123. The reversal of 909023121 is 121320909.

It is not a de Polignac number, because 909023121 - 2² = 909023117 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (909023123) 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, 55776 + ... + 70206.

It is an arithmetic number, because the mean of its divisors is an integer number (84210720).

Almost surely, 2^909023121 is an apocalyptic number.

It is an amenable number.

909023121 is a deficient number, since it is larger than the sum of its proper divisors (438348399).

909023121 is a wasteful number, since it uses less digits than its factorization.

909023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773 (or 16767 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 909023121 is about 30150.0102985057. The cubic root of 909023121 is about 968.7052271725.

The spelling of 909023121 in words is "nine hundred nine million, twenty-three thousand, one hundred twenty-one".