923315209 has 4 divisors (see below), whose sum is σ = 928416580. Its totient is φ = 918213840.

The previous prime is 923315179. The next prime is 923315251. The reversal of 923315209 is 902513329.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93702400 + 829612809 = 9680^2 + 28803^2 .

It is a cyclic number.

It is not a de Polignac number, because 923315209 - 2²⁷ = 789097481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (923315269) 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, 2550414 + ... + 2550775.

It is an arithmetic number, because the mean of its divisors is an integer number (232104145).

Almost surely, 2^923315209 is an apocalyptic number.

It is an amenable number.

923315209 is a deficient number, since it is larger than the sum of its proper divisors (5101371).

923315209 is a wasteful number, since it uses less digits than its factorization.

923315209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101370.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 923315209 is about 30386.1022344097. The cubic root of 923315209 is about 973.7556631803.

It can be divided in two parts, 923315 and 209, that multiplied together give a triangular number (192972835 = T₁₉₆₄₅).

The spelling of 923315209 in words is "nine hundred twenty-three million, three hundred fifteen thousand, two hundred nine".