29249981 has 2 divisors, whose sum is σ = 29249982. Its totient is φ = 29249980.

The previous prime is 29249977. The next prime is 29249993. The reversal of 29249981 is 18994292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 11323225 = 4234^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 29249981 - 2² = 29249977 is a prime.

It is a super-2 number, since 2×29249981² = 1711122777000722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29249581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14624990 + 14624991.

It is an arithmetic number, because the mean of its divisors is an integer number (14624991).

Almost surely, 2^29249981 is an apocalyptic number.

It is an amenable number.

29249981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29249981 is an equidigital number, since it uses as much as digits as its factorization.

29249981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 29249981 is about 5408.3251566451. The cubic root of 29249981 is about 308.1119406737. Note that the first 3 decimals are identical.

The spelling of 29249981 in words is "twenty-nine million, two hundred forty-nine thousand, nine hundred eighty-one".