13893819 has 8 divisors (see below), whose sum is σ = 18619920. Its totient is φ = 9215136.

The previous prime is 13893799. The next prime is 13893821. The reversal of 13893819 is 91839831.

It is a happy number.

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

It is not a de Polignac number, because 13893819 - 2²¹ = 11796667 is a prime.

It is a super-2 number, since 2×13893819² = 386076412809522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13893829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11164 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (2327490).

Almost surely, 2^13893819 is an apocalyptic number.

13893819 is a deficient number, since it is larger than the sum of its proper divisors (4726101).

13893819 is a wasteful number, since it uses less digits than its factorization.

13893819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23709.

The product of its digits is 46656, while the sum is 42.

The square root of 13893819 is about 3727.4413476271. The cubic root of 13893819 is about 240.4033668224.

The spelling of 13893819 in words is "thirteen million, eight hundred ninety-three thousand, eight hundred nineteen".