1220009716 has 6 divisors (see below), whose sum is σ = 2135017010. Its totient is φ = 610004856.

The previous prime is 1220009701. The next prime is 1220009731. The reversal of 1220009716 is 6179000221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220009701) and next prime (1220009731).

It can be written as a sum of positive squares in only one way, i.e., 785120400 + 434889316 = 28020^2 + 20854^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152501211 + ... + 152501218.

Almost surely, 2^1220009716 is an apocalyptic number.

It is an amenable number.

1220009716 is a deficient number, since it is larger than the sum of its proper divisors (915007294).

1220009716 is a wasteful number, since it uses less digits than its factorization.

1220009716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305002433 (or 305002431 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1220009716 is about 34928.6374770045. The cubic root of 1220009716 is about 1068.5325667082.

Adding to 1220009716 its reverse (6179000221), we get a palindrome (7399009937).

The spelling of 1220009716 in words is "one billion, two hundred twenty million, nine thousand, seven hundred sixteen".