23009785 has 4 divisors (see below), whose sum is σ = 27611748. Its totient is φ = 18407824.

The previous prime is 23009783. The next prime is 23009801. The reversal of 23009785 is 58790032.

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 4528384 + 18481401 = 2128^2 + 4299^2 .

It is a cyclic number.

It is not a de Polignac number, because 23009785 - 2¹ = 23009783 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 23009785.

It is not an unprimeable number, because it can be changed into a prime (23009783) 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, 2300974 + ... + 2300983.

It is an arithmetic number, because the mean of its divisors is an integer number (6902937).

Almost surely, 2^23009785 is an apocalyptic number.

It is an amenable number.

23009785 is a deficient number, since it is larger than the sum of its proper divisors (4601963).

23009785 is an equidigital number, since it uses as much as digits as its factorization.

23009785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601962.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 23009785 is about 4796.8515716040. The cubic root of 23009785 is about 284.4270215984.

The spelling of 23009785 in words is "twenty-three million, nine thousand, seven hundred eighty-five".