29939947 has 2 divisors, whose sum is σ = 29939948. Its totient is φ = 29939946.

The previous prime is 29939933. The next prime is 29939957. The reversal of 29939947 is 74993992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29939947 - 2¹¹ = 29937899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29939894 and 29939903.

It is not a weakly prime, because it can be changed into another prime (29939957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14969973 + 14969974.

It is an arithmetic number, because the mean of its divisors is an integer number (14969974).

Almost surely, 2^29939947 is an apocalyptic number.

29939947 is a deficient number, since it is larger than the sum of its proper divisors (1).

29939947 is an equidigital number, since it uses as much as digits as its factorization.

29939947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 52.

The square root of 29939947 is about 5471.7407650582. The cubic root of 29939947 is about 310.5157802828.

The spelling of 29939947 in words is "twenty-nine million, nine hundred thirty-nine thousand, nine hundred forty-seven".