1233131681 has 2 divisors, whose sum is σ = 1233131682. Its totient is φ = 1233131680.

The previous prime is 1233131677. The next prime is 1233131701. The reversal of 1233131681 is 1861313321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 8761600 = 34991^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233131681 - 2² = 1233131677 is a prime.

It is a super-2 number, since 2×1233131681² = 3041227485371771522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1233131381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616565840 + 616565841.

It is an arithmetic number, because the mean of its divisors is an integer number (616565841).

Almost surely, 2^1233131681 is an apocalyptic number.

It is an amenable number.

1233131681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233131681 is an equidigital number, since it uses as much as digits as its factorization.

1233131681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 1233131681 is about 35115.9747266112. The cubic root of 1233131681 is about 1072.3498248587.

The spelling of 1233131681 in words is "one billion, two hundred thirty-three million, one hundred thirty-one thousand, six hundred eighty-one".