23031409 has 2 divisors, whose sum is σ = 23031410. Its totient is φ = 23031408.

The previous prime is 23031403. The next prime is 23031461. The reversal of 23031409 is 90413032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13667809 + 9363600 = 3697^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031409 - 2¹⁵ = 22998641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23031409.

It is not a weakly prime, because it can be changed into another prime (23031403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515704 + 11515705.

It is an arithmetic number, because the mean of its divisors is an integer number (11515705).

Almost surely, 2^23031409 is an apocalyptic number.

It is an amenable number.

23031409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031409 is an equidigital number, since it uses as much as digits as its factorization.

23031409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23031409 is about 4799.1050207304. The cubic root of 23031409 is about 284.5160927514.

The spelling of 23031409 in words is "twenty-three million, thirty-one thousand, four hundred nine".