29938981 has 2 divisors, whose sum is σ = 29938982. Its totient is φ = 29938980.

The previous prime is 29938973. The next prime is 29938999. The reversal of 29938981 is 18983992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 9054081 = 4570^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 29938981 - 2³ = 29938973 is a prime.

It is a super-2 number, since 2×29938981² = 1792685166636722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29938781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14969490 + 14969491.

It is an arithmetic number, because the mean of its divisors is an integer number (14969491).

Almost surely, 2^29938981 is an apocalyptic number.

It is an amenable number.

29938981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29938981 is an equidigital number, since it uses as much as digits as its factorization.

29938981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 29938981 is about 5471.6524926205. The cubic root of 29938981 is about 310.5124406925.

The spelling of 29938981 in words is "twenty-nine million, nine hundred thirty-eight thousand, nine hundred eighty-one".