23061661 has 4 divisors (see below), whose sum is σ = 26356192. Its totient is φ = 19767132.

The previous prime is 23061659. The next prime is 23061671. The reversal of 23061661 is 16616032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23061661 - 2¹ = 23061659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23061671) 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, 1647255 + ... + 1647268.

It is an arithmetic number, because the mean of its divisors is an integer number (6589048).

Almost surely, 2^23061661 is an apocalyptic number.

It is an amenable number.

23061661 is a deficient number, since it is larger than the sum of its proper divisors (3294531).

23061661 is an equidigital number, since it uses as much as digits as its factorization.

23061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294530.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 23061661 is about 4802.2558240893. The cubic root of 23061661 is about 284.6406098843.

Adding to 23061661 its reverse (16616032), we get a palindrome (39677693).

The spelling of 23061661 in words is "twenty-three million, sixty-one thousand, six hundred sixty-one".