1233610981 has 2 divisors, whose sum is σ = 1233610982. Its totient is φ = 1233610980.

The previous prime is 1233610949. The next prime is 1233610997. The reversal of 1233610981 is 1890163321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1004573025 + 229037956 = 31695^2 + 15134^2 .

It is an emirp because it is prime and its reverse (1890163321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1233610981 - 2⁵ = 1233610949 is a prime.

It is a super-2 number, since 2×1233610981² = 3043592104887564722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233613981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616805490 + 616805491.

It is an arithmetic number, because the mean of its divisors is an integer number (616805491).

Almost surely, 2^1233610981 is an apocalyptic number.

It is an amenable number.

1233610981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233610981 is an equidigital number, since it uses as much as digits as its factorization.

1233610981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1233610981 is about 35122.7985929368. The cubic root of 1233610981 is about 1072.4887423541.

The spelling of 1233610981 in words is "one billion, two hundred thirty-three million, six hundred ten thousand, nine hundred eighty-one".