13216669 has 2 divisors, whose sum is σ = 13216670. Its totient is φ = 13216668.

The previous prime is 13216661. The next prime is 13216699. The reversal of 13216669 is 96661231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 2576025 = 3262^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 13216669 - 2³ = 13216661 is a prime.

It is a super-2 number, since 2×13216669² = 349360678911122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13216661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608334 + 6608335.

It is an arithmetic number, because the mean of its divisors is an integer number (6608335).

Almost surely, 2^13216669 is an apocalyptic number.

It is an amenable number.

13216669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13216669 is an equidigital number, since it uses as much as digits as its factorization.

13216669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 13216669 is about 3635.4736967829. The cubic root of 13216669 is about 236.4325889874.

The spelling of 13216669 in words is "thirteen million, two hundred sixteen thousand, six hundred sixty-nine".