29999947 has 2 divisors, whose sum is σ = 29999948. Its totient is φ = 29999946.

The previous prime is 29999941. The next prime is 29999989. The reversal of 29999947 is 74999992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29999947 - 2⁷ = 29999819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29999891 and 29999900.

It is not a weakly prime, because it can be changed into another prime (29999941) 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 as a sum of consecutive naturals, namely, 14999973 + 14999974.

It is an arithmetic number, because the mean of its divisors is an integer number (14999974).

Almost surely, 2^29999947 is an apocalyptic number.

29999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

29999947 is an equidigital number, since it uses as much as digits as its factorization.

29999947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 58.

The square root of 29999947 is about 5477.2207368336. The cubic root of 29999947 is about 310.7230676138.

The spelling of 29999947 in words is "twenty-nine million, nine hundred ninety-nine thousand, nine hundred forty-seven".