13938669 has 8 divisors (see below), whose sum is σ = 20649920. Its totient is φ = 9292428.

The previous prime is 13938581. The next prime is 13938671. The reversal of 13938669 is 96683931.

It is not a de Polignac number, because 13938669 - 2¹⁹ = 13414381 is a prime.

It is a super-2 number, since 2×13938669² = 388572986983122, 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 (13938679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258097 + ... + 258150.

It is an arithmetic number, because the mean of its divisors is an integer number (2581240).

Almost surely, 2^13938669 is an apocalyptic number.

It is an amenable number.

13938669 is a deficient number, since it is larger than the sum of its proper divisors (6711251).

13938669 is an equidigital number, since it uses as much as digits as its factorization.

13938669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516256 (or 516250 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 13938669 is about 3733.4526915444. The cubic root of 13938669 is about 240.6617673395.

The spelling of 13938669 in words is "thirteen million, nine hundred thirty-eight thousand, six hundred sixty-nine".