13809375 has 36 divisors (see below), whose sum is σ = 24982776. Its totient is φ = 7350000.

The previous prime is 13809373. The next prime is 13809377. The reversal of 13809375 is 57390831.

It is an interprime number because it is at equal distance from previous prime (13809373) and next prime (13809377).

It is not a de Polignac number, because 13809375 - 2¹ = 13809373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809373) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27880 + ... + 28370.

It is an arithmetic number, because the mean of its divisors is an integer number (693966).

Almost surely, 2^13809375 is an apocalyptic number.

13809375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13809375 is a deficient number, since it is larger than the sum of its proper divisors (11173401).

13809375 is an frugal number, since it uses more digits than its factorization.

13809375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 13809375 is about 3716.0967425512. The cubic root of 13809375 is about 239.9153347193.

The spelling of 13809375 in words is "thirteen million, eight hundred nine thousand, three hundred seventy-five".