1220316739 has 2 divisors, whose sum is σ = 1220316740. Its totient is φ = 1220316738.

The previous prime is 1220316733. The next prime is 1220316787. The reversal of 1220316739 is 9376130221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220316739 - 2⁷ = 1220316611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220316733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610158369 + 610158370.

It is an arithmetic number, because the mean of its divisors is an integer number (610158370).

Almost surely, 2^1220316739 is an apocalyptic number.

1220316739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220316739 is an equidigital number, since it uses as much as digits as its factorization.

1220316739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1220316739 is about 34933.0322044909. The cubic root of 1220316739 is about 1068.6221934694.

The spelling of 1220316739 in words is "one billion, two hundred twenty million, three hundred sixteen thousand, seven hundred thirty-nine".