13609722 has 32 divisors (see below), whose sum is σ = 31256064. Its totient is φ = 3870000.

The previous prime is 13609709. The next prime is 13609723. The reversal of 13609722 is 22790631.

It is a self number, because there is not a number n which added to its sum of digits gives 13609722.

It is not an unprimeable number, because it can be changed into a prime (13609723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9897 + ... + 11187.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^13609722 is an apocalyptic number.

13609722 is an abundant number, since it is smaller than the sum of its proper divisors (17646342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13609722 is a wasteful number, since it uses less digits than its factorization.

13609722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 13609722 is about 3689.1356711295. The cubic root of 13609722 is about 238.7535025025.

The spelling of 13609722 in words is "thirteen million, six hundred nine thousand, seven hundred twenty-two".