1220986747 has 2 divisors, whose sum is σ = 1220986748. Its totient is φ = 1220986746.

The previous prime is 1220986729. The next prime is 1220986751. The reversal of 1220986747 is 7476890221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7476890221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220986747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220986697 and 1220986706.

It is not a weakly prime, because it can be changed into another prime (1220986777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610493373 + 610493374.

It is an arithmetic number, because the mean of its divisors is an integer number (610493374).

Almost surely, 2^1220986747 is an apocalyptic number.

1220986747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220986747 is an equidigital number, since it uses as much as digits as its factorization.

1220986747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 1220986747 is about 34942.6207803593. The cubic root of 1220986747 is about 1068.8177313435.

The spelling of 1220986747 in words is "one billion, two hundred twenty million, nine hundred eighty-six thousand, seven hundred forty-seven".