13699399 has 32 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 10202112.

The previous prime is 13699393. The next prime is 13699403. The reversal of 13699399 is 99399631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13699399 - 2¹³ = 13691207 is a prime.

It is a super-2 number, since 2×13699399² = 375347065922402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13699393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165012 + ... + 165094.

It is an arithmetic number, because the mean of its divisors is an integer number (559440).

Almost surely, 2^13699399 is an apocalyptic number.

13699399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13699399 is a deficient number, since it is larger than the sum of its proper divisors (4202681).

13699399 is a wasteful number, since it uses less digits than its factorization.

13699399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its digits is 354294, while the sum is 49.

The square root of 13699399 is about 3701.2699172041. The cubic root of 13699399 is about 239.2767520559.

The spelling of 13699399 in words is "thirteen million, six hundred ninety-nine thousand, three hundred ninety-nine".