13573573 has 6 divisors (see below), whose sum is σ = 14698194. Its totient is φ = 12529296.

The previous prime is 13573559. The next prime is 13573589. The reversal of 13573573 is 37537531.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 850084 + 12723489 = 922^2 + 3567^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13573573 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 (13573513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39990 + ... + 40327.

It is an arithmetic number, because the mean of its divisors is an integer number (2449699).

Almost surely, 2^13573573 is an apocalyptic number.

13573573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13573573 is a deficient number, since it is larger than the sum of its proper divisors (1124621).

13573573 is an equidigital number, since it uses as much as digits as its factorization.

13573573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80343 (or 80330 counting only the distinct ones).

The product of its digits is 33075, while the sum is 34.

The square root of 13573573 is about 3684.2330273749. The cubic root of 13573573 is about 238.5419294069.

The spelling of 13573573 in words is "thirteen million, five hundred seventy-three thousand, five hundred seventy-three".