13721099 has 8 divisors (see below), whose sum is σ = 15947520. Its totient is φ = 11561256.

The previous prime is 13721093. The next prime is 13721111. The reversal of 13721099 is 99012731.

It is a happy number.

13721099 is digitally balanced in base 2 and base 8, because in such bases 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 not a de Polignac number, because 13721099 - 2⁸ = 13720843 is a prime.

It is a Duffinian number.

13721099 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (13721093) 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, 16199 + ... + 17024.

It is an arithmetic number, because the mean of its divisors is an integer number (1993440).

Almost surely, 2^13721099 is an apocalyptic number.

13721099 is a deficient number, since it is larger than the sum of its proper divisors (2226421).

13721099 is an equidigital number, since it uses as much as digits as its factorization.

13721099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33289.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 13721099 is about 3704.2001835754. The cubic root of 13721099 is about 239.4030244170.

The spelling of 13721099 in words is "thirteen million, seven hundred twenty-one thousand, ninety-nine".