23109745 has 4 divisors (see below), whose sum is σ = 27731700. Its totient is φ = 18487792.

The previous prime is 23109739. The next prime is 23109761. The reversal of 23109745 is 54790132.

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 9144576 + 13965169 = 3024^2 + 3737^2 .

It is a cyclic number.

It is not a de Polignac number, because 23109745 - 2¹³ = 23101553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310970 + ... + 2310979.

It is an arithmetic number, because the mean of its divisors is an integer number (6932925).

Almost surely, 2^23109745 is an apocalyptic number.

It is an amenable number.

23109745 is a deficient number, since it is larger than the sum of its proper divisors (4621955).

23109745 is an equidigital number, since it uses as much as digits as its factorization.

23109745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621954.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 23109745 is about 4807.2596143749. The cubic root of 23109745 is about 284.8382995733.

Adding to 23109745 its reverse (54790132), we get a palindrome (77899877).

The spelling of 23109745 in words is "twenty-three million, one hundred nine thousand, seven hundred forty-five".