13608722 has 4 divisors (see below), whose sum is σ = 20413086. Its totient is φ = 6804360.

The previous prime is 13608719. The next prime is 13608739. The reversal of 13608722 is 22780631.

It is a happy number.

It is a Cunningham number, because it is equal to 3689²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 1 = 3689^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3402179 + ... + 3402182.

Almost surely, 2^13608722 is an apocalyptic number.

13608722 is a deficient number, since it is larger than the sum of its proper divisors (6804364).

13608722 is an equidigital number, since it uses as much as digits as its factorization.

13608722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804363.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 13608722 is about 3689.0001355381. Note that the first 3 decimals coincide. The cubic root of 13608722 is about 238.7476547379.

The spelling of 13608722 in words is "thirteen million, six hundred eight thousand, seven hundred twenty-two".