29693681 has 2 divisors, whose sum is σ = 29693682. Its totient is φ = 29693680.

The previous prime is 29693633. The next prime is 29693683. The reversal of 29693681 is 18639692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27133681 + 2560000 = 5209^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 29693681 - 2⁶ = 29693617 is a prime.

It is a super-2 number, since 2×29693681² = 1763429382659522, which contains 22 as substring.

Together with 29693683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29693683) 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 as a sum of consecutive naturals, namely, 14846840 + 14846841.

It is an arithmetic number, because the mean of its divisors is an integer number (14846841).

Almost surely, 2^29693681 is an apocalyptic number.

It is an amenable number.

29693681 is a deficient number, since it is larger than the sum of its proper divisors (1).

29693681 is an equidigital number, since it uses as much as digits as its factorization.

29693681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 29693681 is about 5449.1908573659. The cubic root of 29693681 is about 309.6620701901.

The spelling of 29693681 in words is "twenty-nine million, six hundred ninety-three thousand, six hundred eighty-one".