22709861 has 4 divisors (see below), whose sum is σ = 22736352. Its totient is φ = 22683372.

The previous prime is 22709849. The next prime is 22709903. The reversal of 22709861 is 16890722.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 22709861 - 2¹⁰ = 22708837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22709831) 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, 11915 + ... + 13688.

It is an arithmetic number, because the mean of its divisors is an integer number (5684088).

Almost surely, 2^22709861 is an apocalyptic number.

It is an amenable number.

22709861 is a deficient number, since it is larger than the sum of its proper divisors (26491).

22709861 is an equidigital number, since it uses as much as digits as its factorization.

22709861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26490.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 22709861 is about 4765.4864389693. The cubic root of 22709861 is about 283.1858127861.

The spelling of 22709861 in words is "twenty-two million, seven hundred nine thousand, eight hundred sixty-one".