29290981 has 2 divisors, whose sum is σ = 29290982. Its totient is φ = 29290980.

The previous prime is 29290973. The next prime is 29290991. The reversal of 29290981 is 18909292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28793956 + 497025 = 5366^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 29290981 - 2³ = 29290973 is a prime.

It is a super-2 number, since 2×29290981² = 1715923135884722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29290931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14645490 + 14645491.

It is an arithmetic number, because the mean of its divisors is an integer number (14645491).

Almost surely, 2^29290981 is an apocalyptic number.

It is an amenable number.

29290981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29290981 is an equidigital number, since it uses as much as digits as its factorization.

29290981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 29290981 is about 5412.1142818680. The cubic root of 29290981 is about 308.2558346903.

The spelling of 29290981 in words is "twenty-nine million, two hundred ninety thousand, nine hundred eighty-one".