13820999 has 8 divisors (see below), whose sum is σ = 15181440. Its totient is φ = 12523896.

The previous prime is 13820981. The next prime is 13821007. The reversal of 13820999 is 99902831.

13820999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13820999 - 2⁸ = 13820743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13820959) 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, 15377 + ... + 16250.

It is an arithmetic number, because the mean of its divisors is an integer number (1897680).

Almost surely, 2^13820999 is an apocalyptic number.

13820999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13820999 is a deficient number, since it is larger than the sum of its proper divisors (1360441).

13820999 is a wasteful number, since it uses less digits than its factorization.

13820999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31669.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 13820999 is about 3717.6604202105. The cubic root of 13820999 is about 239.9826318450.

The spelling of 13820999 in words is "thirteen million, eight hundred twenty thousand, nine hundred ninety-nine".