29807989 has 4 divisors (see below), whose sum is σ = 29833324. Its totient is φ = 29782656.

The previous prime is 29807983. The next prime is 29807993. The reversal of 29807989 is 98970892.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23136100 + 6671889 = 4810^2 + 2583^2 .

It is a cyclic number.

It is not a de Polignac number, because 29807989 - 2¹³ = 29799797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29807983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10812 + ... + 13285.

It is an arithmetic number, because the mean of its divisors is an integer number (7458331).

Almost surely, 2^29807989 is an apocalyptic number.

It is an amenable number.

29807989 is a deficient number, since it is larger than the sum of its proper divisors (25335).

29807989 is a wasteful number, since it uses less digits than its factorization.

29807989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25334.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 29807989 is about 5459.6693123302. The cubic root of 29807989 is about 310.0589170016.

The spelling of 29807989 in words is "twenty-nine million, eight hundred seven thousand, nine hundred eighty-nine".