1234229681 has 2 divisors, whose sum is σ = 1234229682. Its totient is φ = 1234229680.

The previous prime is 1234229677. The next prime is 1234229687. The reversal of 1234229681 is 1869224321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 9859600 = 34991^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234229681 - 2² = 1234229677 is a prime.

It is a super-2 number, since 2×1234229681² = 3046645810922723522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1234229687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617114840 + 617114841.

It is an arithmetic number, because the mean of its divisors is an integer number (617114841).

Almost surely, 2^1234229681 is an apocalyptic number.

It is an amenable number.

1234229681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234229681 is an equidigital number, since it uses as much as digits as its factorization.

1234229681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 1234229681 is about 35131.6051583186. The cubic root of 1234229681 is about 1072.6680095339.

The spelling of 1234229681 in words is "one billion, two hundred thirty-four million, two hundred twenty-nine thousand, six hundred eighty-one".