29979799 has 2 divisors, whose sum is σ = 29979800. Its totient is φ = 29979798.

The previous prime is 29979797. The next prime is 29979809. The reversal of 29979799 is 99797992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29979799 - 2¹ = 29979797 is a prime.

Together with 29979797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29979797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14989899 + 14989900.

It is an arithmetic number, because the mean of its divisors is an integer number (14989900).

Almost surely, 2^29979799 is an apocalyptic number.

29979799 is a deficient number, since it is larger than the sum of its proper divisors (1).

29979799 is an equidigital number, since it uses as much as digits as its factorization.

29979799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5786802, while the sum is 61.

The square root of 29979799 is about 5475.3811739458. The cubic root of 29979799 is about 310.6534913754.

The spelling of 29979799 in words is "twenty-nine million, nine hundred seventy-nine thousand, seven hundred ninety-nine".