13909012 has 12 divisors (see below), whose sum is σ = 26213236. Its totient is φ = 6419520.

The previous prime is 13908967. The next prime is 13909019. The reversal of 13909012 is 21090931.

It can be written as a sum of positive squares in 2 ways, for example, as 8737936 + 5171076 = 2956^2 + 2274^2 .

It is a super-2 number, since 2×13909012² = 386921229632288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909019) 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, 133689 + ... + 133792.

Almost surely, 2^13909012 is an apocalyptic number.

It is an amenable number.

13909012 is a deficient number, since it is larger than the sum of its proper divisors (12304224).

13909012 is a wasteful number, since it uses less digits than its factorization.

13909012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267498 (or 267496 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 13909012 is about 3729.4787839590. The cubic root of 13909012 is about 240.4909625568.

Adding to 13909012 its reverse (21090931), we get a palindrome (34999943).

The spelling of 13909012 in words is "thirteen million, nine hundred nine thousand, twelve".