29936981 has 2 divisors, whose sum is σ = 29936982. Its totient is φ = 29936980.

The previous prime is 29936957. The next prime is 29936993. The reversal of 29936981 is 18963992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 70756 = 5465^2 + 266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29936981 is a prime.

It is a super-2 number, since 2×29936981² = 1792445662788722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29936911) 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, 14968490 + 14968491.

It is an arithmetic number, because the mean of its divisors is an integer number (14968491).

Almost surely, 2^29936981 is an apocalyptic number.

It is an amenable number.

29936981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29936981 is an equidigital number, since it uses as much as digits as its factorization.

29936981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 29936981 is about 5471.4697294237. The cubic root of 29936981 is about 310.5055261986.

The spelling of 29936981 in words is "twenty-nine million, nine hundred thirty-six thousand, nine hundred eighty-one".