23273989 has 2 divisors, whose sum is σ = 23273990. Its totient is φ = 23273988.

The previous prime is 23273981. The next prime is 23274061. The reversal of 23273989 is 98937232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22877089 + 396900 = 4783^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 23273989 - 2³ = 23273981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23273981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11636994 + 11636995.

It is an arithmetic number, because the mean of its divisors is an integer number (11636995).

Almost surely, 2^23273989 is an apocalyptic number.

It is an amenable number.

23273989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23273989 is an equidigital number, since it uses as much as digits as its factorization.

23273989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 23273989 is about 4824.3122825953. The cubic root of 23273989 is about 285.5115016688.

The spelling of 23273989 in words is "twenty-three million, two hundred seventy-three thousand, nine hundred eighty-nine".