13931433 has 12 divisors (see below), whose sum is σ = 20868848. Its totient is φ = 9287460.

The previous prime is 13931383. The next prime is 13931443. The reversal of 13931433 is 33413931.

13931433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13931433 - 2¹³ = 13923241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13931397 and 13931406.

It is not an unprimeable number, because it can be changed into a prime (13931443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28423 + ... + 28908.

Almost surely, 2^13931433 is an apocalyptic number.

It is an amenable number.

13931433 is a deficient number, since it is larger than the sum of its proper divisors (6937415).

13931433 is an frugal number, since it uses more digits than its factorization.

13931433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57346 (or 57334 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

The square root of 13931433 is about 3732.4834895817. The cubic root of 13931433 is about 240.6201151086.

The spelling of 13931433 in words is "thirteen million, nine hundred thirty-one thousand, four hundred thirty-three".