13809970 has 8 divisors (see below), whose sum is σ = 24857964. Its totient is φ = 5523984.

The previous prime is 13809949. The next prime is 13809977. The reversal of 13809970 is 7990831.

13809970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13741849 + 68121 = 3707^2 + 261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13809977) 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, 690489 + ... + 690508.

Almost surely, 2^13809970 is an apocalyptic number.

13809970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13809970 is a deficient number, since it is larger than the sum of its proper divisors (11047994).

13809970 is a wasteful number, since it uses less digits than its factorization.

13809970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381004.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 13809970 is about 3716.1767988082. The cubic root of 13809970 is about 239.9187803875.

The spelling of 13809970 in words is "thirteen million, eight hundred nine thousand, nine hundred seventy".