29889967 has 4 divisors (see below), whose sum is σ = 29903680. Its totient is φ = 29876256.

The previous prime is 29889953. The next prime is 29889971. The reversal of 29889967 is 76998892.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29889967 is a prime.

It is a super-2 number, since 2×29889967² = 1786820254522178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29889917) 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 in 3 ways as a sum of consecutive naturals, for example, 2778 + ... + 8215.

It is an arithmetic number, because the mean of its divisors is an integer number (7475920).

Almost surely, 2^29889967 is an apocalyptic number.

29889967 is a deficient number, since it is larger than the sum of its proper divisors (13713).

29889967 is a wasteful number, since it uses less digits than its factorization.

29889967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13712.

The product of its digits is 3919104, while the sum is 58.

The square root of 29889967 is about 5467.1717551217. The cubic root of 29889967 is about 310.3428984076.

The spelling of 29889967 in words is "twenty-nine million, eight hundred eighty-nine thousand, nine hundred sixty-seven".