1220967697 has 2 divisors, whose sum is σ = 1220967698. Its totient is φ = 1220967696.

The previous prime is 1220967677. The next prime is 1220967703. The reversal of 1220967697 is 7967690221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185493761 + 35473936 = 34431^2 + 5956^2 .

It is an emirp because it is prime and its reverse (7967690221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220967697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220967697.

It is not a weakly prime, because it can be changed into another prime (1220967667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610483848 + 610483849.

It is an arithmetic number, because the mean of its divisors is an integer number (610483849).

Almost surely, 2^1220967697 is an apocalyptic number.

It is an amenable number.

1220967697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220967697 is an equidigital number, since it uses as much as digits as its factorization.

1220967697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 1220967697 is about 34942.3481895536. The cubic root of 1220967697 is about 1068.8121727018.

The spelling of 1220967697 in words is "one billion, two hundred twenty million, nine hundred sixty-seven thousand, six hundred ninety-seven".