29999999 has 2 divisors, whose sum is σ = 30000000. Its totient is φ = 29999998.

The previous prime is 29999989. The next prime is 30000001. The reversal of 29999999 is 99999992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29999999 - 2²⁰ = 28951423 is a prime.

It is a Sophie Germain prime.

Together with 30000001, it forms a pair of twin primes.

It is a Chen prime.

29999999 is a modest number, since divided by 9999 gives 2999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29999989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14999999 + 15000000.

It is an arithmetic number, because the mean of its divisors is an integer number (15000000).

Almost surely, 2^29999999 is an apocalyptic number.

29999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

29999999 is an equidigital number, since it uses as much as digits as its factorization.

29999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9565938, while the sum is 65.

The square root of 29999999 is about 5477.2254837646. The cubic root of 29999999 is about 310.7232471429.

It can be divided in two parts, 2 and 9999999, that added together give a palindrome (10000001).

The spelling of 29999999 in words is "twenty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".