1223000981 has 2 divisors, whose sum is σ = 1223000982. Its totient is φ = 1223000980.

The previous prime is 1223000941. The next prime is 1223001061. The reversal of 1223000981 is 1890003221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208674756 + 14326225 = 34766^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223000981 - 2¹⁰ = 1222999957 is a prime.

It is a super-2 number, since 2×1223000981² = 2991462799053924722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223000981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223000941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611500490 + 611500491.

It is an arithmetic number, because the mean of its divisors is an integer number (611500491).

Almost surely, 2^1223000981 is an apocalyptic number.

It is an amenable number.

1223000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223000981 is an equidigital number, since it uses as much as digits as its factorization.

1223000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1223000981 is about 34971.4309258286. The cubic root of 1223000981 is about 1069.4051431965.

The spelling of 1223000981 in words is "one billion, two hundred twenty-three million, nine hundred eighty-one", and thus it is an aban number.