29012861 has 2 divisors, whose sum is σ = 29012862. Its totient is φ = 29012860.

The previous prime is 29012849. The next prime is 29012891. The reversal of 29012861 is 16821092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24810361 + 4202500 = 4981^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 29012861 - 2¹⁰ = 29011837 is a prime.

It is a super-2 number, since 2×29012861² = 1683492206810642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29012891) 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, 14506430 + 14506431.

It is an arithmetic number, because the mean of its divisors is an integer number (14506431).

Almost surely, 2^29012861 is an apocalyptic number.

It is an amenable number.

29012861 is a deficient number, since it is larger than the sum of its proper divisors (1).

29012861 is an equidigital number, since it uses as much as digits as its factorization.

29012861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 29012861 is about 5386.3587886438. The cubic root of 29012861 is about 307.2770931743.

The spelling of 29012861 in words is "twenty-nine million, twelve thousand, eight hundred sixty-one".