29013821 has 2 divisors, whose sum is σ = 29013822. Its totient is φ = 29013820.

The previous prime is 29013769. The next prime is 29013827. The reversal of 29013821 is 12831092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17757796 + 11256025 = 4214^2 + 3355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29013821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29013827) 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, 14506910 + 14506911.

It is an arithmetic number, because the mean of its divisors is an integer number (14506911).

Almost surely, 2^29013821 is an apocalyptic number.

It is an amenable number.

29013821 is a deficient number, since it is larger than the sum of its proper divisors (1).

29013821 is an equidigital number, since it uses as much as digits as its factorization.

29013821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 29013821 is about 5386.4479019109. The cubic root of 29013821 is about 307.2804822777.

The spelling of 29013821 in words is "twenty-nine million, thirteen thousand, eight hundred twenty-one".