13945389 has 16 divisors (see below), whose sum is σ = 19779840. Its totient is φ = 8709120.

The previous prime is 13945369. The next prime is 13945403. The reversal of 13945389 is 98354931.

13945389 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13945389 - 2²¹ = 11848237 is a prime.

It is a super-2 number, since 2×13945389² = 388947748722642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13945389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13945339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13317 + ... + 14325.

It is an arithmetic number, because the mean of its divisors is an integer number (1236240).

Almost surely, 2^13945389 is an apocalyptic number.

It is an amenable number.

13945389 is a deficient number, since it is larger than the sum of its proper divisors (5834451).

13945389 is a wasteful number, since it uses less digits than its factorization.

13945389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its digits is 116640, while the sum is 42.

The square root of 13945389 is about 3734.3525543258. The cubic root of 13945389 is about 240.7004364369.

The spelling of 13945389 in words is "thirteen million, nine hundred forty-five thousand, three hundred eighty-nine".