1220647319 has 2 divisors, whose sum is σ = 1220647320. Its totient is φ = 1220647318.

The previous prime is 1220647303. The next prime is 1220647369. The reversal of 1220647319 is 9137460221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220647319 - 2⁴ = 1220647303 is a prime.

It is a super-2 number, since 2×1220647319² = 2979959754763775522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220647369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610323659 + 610323660.

It is an arithmetic number, because the mean of its divisors is an integer number (610323660).

Almost surely, 2^1220647319 is an apocalyptic number.

1220647319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220647319 is an equidigital number, since it uses as much as digits as its factorization.

1220647319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1220647319 is about 34937.7635088453. The cubic root of 1220647319 is about 1068.7186802308.

The spelling of 1220647319 in words is "one billion, two hundred twenty million, six hundred forty-seven thousand, three hundred nineteen".