220447399 has 2 divisors, whose sum is σ = 220447400. Its totient is φ = 220447398.

The previous prime is 220447397. The next prime is 220447421. The reversal of 220447399 is 993744022.

220447399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220447399 - 2¹ = 220447397 is a prime.

Together with 220447397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220447397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110223699 + 110223700.

It is an arithmetic number, because the mean of its divisors is an integer number (110223700).

Almost surely, 2^220447399 is an apocalyptic number.

220447399 is a deficient number, since it is larger than the sum of its proper divisors (1).

220447399 is an equidigital number, since it uses as much as digits as its factorization.

220447399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 220447399 is about 14847.4711314756. The cubic root of 220447399 is about 604.0900182705.

The spelling of 220447399 in words is "two hundred twenty million, four hundred forty-seven thousand, three hundred ninety-nine".