13772309 has 2 divisors, whose sum is σ = 13772310. Its totient is φ = 13772308.

The previous prime is 13772299. The next prime is 13772371. The reversal of 13772309 is 90327731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12802084 + 970225 = 3578^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 13772309 - 2⁴ = 13772293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13772389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6886154 + 6886155.

It is an arithmetic number, because the mean of its divisors is an integer number (6886155).

Almost surely, 2^13772309 is an apocalyptic number.

It is an amenable number.

13772309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13772309 is an equidigital number, since it uses as much as digits as its factorization.

13772309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 13772309 is about 3711.1061693247. The cubic root of 13772309 is about 239.7004886446.

The spelling of 13772309 in words is "thirteen million, seven hundred seventy-two thousand, three hundred nine".