29985999 has 4 divisors (see below), whose sum is σ = 39981336. Its totient is φ = 19990664.

The previous prime is 29985973. The next prime is 29986003. The reversal of 29985999 is 99958992.

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 29985999 - 2⁷ = 29985871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29985919) 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, 4997664 + ... + 4997669.

It is an arithmetic number, because the mean of its divisors is an integer number (9995334).

Almost surely, 2^29985999 is an apocalyptic number.

29985999 is a deficient number, since it is larger than the sum of its proper divisors (9995337).

29985999 is an equidigital number, since it uses as much as digits as its factorization.

29985999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9995336.

The product of its digits is 4723920, while the sum is 60.

The square root of 29985999 is about 5475.9473153054. The cubic root of 29985999 is about 310.6749048933.

The spelling of 29985999 in words is "twenty-nine million, nine hundred eighty-five thousand, nine hundred ninety-nine".