13621099 has 2 divisors, whose sum is σ = 13621100. Its totient is φ = 13621098.

The previous prime is 13621087. The next prime is 13621109. The reversal of 13621099 is 99012631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13621099 - 2¹¹ = 13619051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13621099.

It is not a weakly prime, because it can be changed into another prime (13621009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810549 + 6810550.

It is an arithmetic number, because the mean of its divisors is an integer number (6810550).

Almost surely, 2^13621099 is an apocalyptic number.

13621099 is a deficient number, since it is larger than the sum of its proper divisors (1).

13621099 is an equidigital number, since it uses as much as digits as its factorization.

13621099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 13621099 is about 3690.6773091128. The cubic root of 13621099 is about 238.8200123610.

The spelling of 13621099 in words is "thirteen million, six hundred twenty-one thousand, ninety-nine".