1222220639 has 2 divisors, whose sum is σ = 1222220640. Its totient is φ = 1222220638.

The previous prime is 1222220617. The next prime is 1222220647. The reversal of 1222220639 is 9360222221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222220639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222220669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110319 + 611110320.

It is an arithmetic number, because the mean of its divisors is an integer number (611110320).

Almost surely, 2^1222220639 is an apocalyptic number.

1222220639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222220639 is an equidigital number, since it uses as much as digits as its factorization.

1222220639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1222220639 is about 34960.2722958503. The cubic root of 1222220639 is about 1069.1776483403.

The spelling of 1222220639 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, six hundred thirty-nine".