29861389 has 2 divisors, whose sum is σ = 29861390. Its totient is φ = 29861388.

The previous prime is 29861347. The next prime is 29861399. The reversal of 29861389 is 98316892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 8655364 = 4605^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 29861389 - 2¹⁵ = 29828621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29861399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14930694 + 14930695.

It is an arithmetic number, because the mean of its divisors is an integer number (14930695).

Almost surely, 2^29861389 is an apocalyptic number.

It is an amenable number.

29861389 is a deficient number, since it is larger than the sum of its proper divisors (1).

29861389 is an equidigital number, since it uses as much as digits as its factorization.

29861389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 29861389 is about 5464.5575301208. The cubic root of 29861389 is about 310.2439598862.

The spelling of 29861389 in words is "twenty-nine million, eight hundred sixty-one thousand, three hundred eighty-nine".