23009965 has 24 divisors (see below), whose sum is σ = 30825144. Its totient is φ = 16473600.

The previous prime is 23009953. The next prime is 23009983. The reversal of 23009965 is 56990032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1359556 + 21650409 = 1166^2 + 4653^2 .

It is not a de Polignac number, because 23009965 - 2⁵ = 23009933 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 23009965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43905 + ... + 44425.

It is an arithmetic number, because the mean of its divisors is an integer number (1284381).

Almost surely, 2^23009965 is an apocalyptic number.

It is an amenable number.

23009965 is a deficient number, since it is larger than the sum of its proper divisors (7815179).

23009965 is a wasteful number, since it uses less digits than its factorization.

23009965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 610 counting only the distinct ones).

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

The square root of 23009965 is about 4796.8703338740. The cubic root of 23009965 is about 284.4277632644.

Adding to 23009965 its reverse (56990032), we get a palindrome (79999997).

The spelling of 23009965 in words is "twenty-three million, nine thousand, nine hundred sixty-five".