1222669639 has 2 divisors, whose sum is σ = 1222669640. Its totient is φ = 1222669638.

The previous prime is 1222669621. The next prime is 1222669663. The reversal of 1222669639 is 9369662221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9369662221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222669639 - 2⁵ = 1222669607 is a prime.

It is a super-2 number, since 2×1222669639² = 2989842092264780642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222669039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611334819 + 611334820.

It is an arithmetic number, because the mean of its divisors is an integer number (611334820).

Almost surely, 2^1222669639 is an apocalyptic number.

1222669639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222669639 is an equidigital number, since it uses as much as digits as its factorization.

1222669639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 1222669639 is about 34966.6932808923. The cubic root of 1222669639 is about 1069.3085581436.

The spelling of 1222669639 in words is "one billion, two hundred twenty-two million, six hundred sixty-nine thousand, six hundred thirty-nine".