29887939 has 4 divisors (see below), whose sum is σ = 30029800. Its totient is φ = 29746080.

The previous prime is 29887901. The next prime is 29887961. The reversal of 29887939 is 93978892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29887939 - 2¹³ = 29879747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29887939.

It is not an unprimeable number, because it can be changed into a prime (29887339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70614 + ... + 71035.

It is an arithmetic number, because the mean of its divisors is an integer number (7507450).

Almost surely, 2^29887939 is an apocalyptic number.

29887939 is a deficient number, since it is larger than the sum of its proper divisors (141861).

29887939 is a wasteful number, since it uses less digits than its factorization.

29887939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141860.

The product of its digits is 1959552, while the sum is 55.

The square root of 29887939 is about 5466.9862813071. The cubic root of 29887939 is about 310.3358794456.

The spelling of 29887939 in words is "twenty-nine million, eight hundred eighty-seven thousand, nine hundred thirty-nine".