13399669 has 4 divisors (see below), whose sum is σ = 13416480. Its totient is φ = 13382860.

The previous prime is 13399663. The next prime is 13399679. The reversal of 13399669 is 96699331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96699331 = 3361 ⋅28771.

It is a cyclic number.

It is not a de Polignac number, because 13399669 - 2⁵ = 13399637 is a prime.

It is a super-2 number, since 2×13399669² = 359102258619122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13399663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7147 + ... + 8824.

It is an arithmetic number, because the mean of its divisors is an integer number (3354120).

Almost surely, 2^13399669 is an apocalyptic number.

It is an amenable number.

13399669 is a deficient number, since it is larger than the sum of its proper divisors (16811).

13399669 is an equidigital number, since it uses as much as digits as its factorization.

13399669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16810.

The product of its digits is 236196, while the sum is 46.

The square root of 13399669 is about 3660.5558321107. Note that the first 3 decimals coincide. The cubic root of 13399669 is about 237.5188180842.

The spelling of 13399669 in words is "thirteen million, three hundred ninety-nine thousand, six hundred sixty-nine".