1233672981 has 24 divisors (see below), whose sum is σ = 1704203424. Its totient is φ = 793765440.

The previous prime is 1233672959. The next prime is 1233672989. The reversal of 1233672981 is 1892763321.

It is a de Polignac number, because none of the positive numbers 2^k-1233672981 is a prime.

It is a super-2 number, since 2×1233672981² = 3043898048098852722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233672989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 536871 + ... + 539163.

It is an arithmetic number, because the mean of its divisors is an integer number (71008476).

Almost surely, 2^1233672981 is an apocalyptic number.

It is an amenable number.

1233672981 is a deficient number, since it is larger than the sum of its proper divisors (470530443).

1233672981 is a wasteful number, since it uses less digits than its factorization.

1233672981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501 (or 2464 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 1233672981 is about 35123.6811994415. The cubic root of 1233672981 is about 1072.5067094412.

The spelling of 1233672981 in words is "one billion, two hundred thirty-three million, six hundred seventy-two thousand, nine hundred eighty-one".