220913999 has 2 divisors, whose sum is σ = 220914000. Its totient is φ = 220913998.

The previous prime is 220913989. The next prime is 220914041. The reversal of 220913999 is 999319022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220913999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220913989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110456999 + 110457000.

It is an arithmetic number, because the mean of its divisors is an integer number (110457000).

Almost surely, 2^220913999 is an apocalyptic number.

220913999 is a deficient number, since it is larger than the sum of its proper divisors (1).

220913999 is an equidigital number, since it uses as much as digits as its factorization.

220913999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 220913999 is about 14863.1759392130. The cubic root of 220913999 is about 604.5159245098.

The spelling of 220913999 in words is "two hundred twenty million, nine hundred thirteen thousand, nine hundred ninety-nine".