1220989199 has 2 divisors, whose sum is σ = 1220989200. Its totient is φ = 1220989198.

The previous prime is 1220989127. The next prime is 1220989213. The reversal of 1220989199 is 9919890221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220989199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220959199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610494599 + 610494600.

It is an arithmetic number, because the mean of its divisors is an integer number (610494600).

Almost surely, 2^1220989199 is an apocalyptic number.

1220989199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220989199 is an equidigital number, since it uses as much as digits as its factorization.

1220989199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 1220989199 is about 34942.6558664335. The cubic root of 1220989199 is about 1068.8184468138.

The spelling of 1220989199 in words is "one billion, two hundred twenty million, nine hundred eighty-nine thousand, one hundred ninety-nine".