29972147 has 2 divisors, whose sum is σ = 29972148. Its totient is φ = 29972146.

The previous prime is 29972143. The next prime is 29972149. The reversal of 29972147 is 74127992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29972147 - 2² = 29972143 is a prime.

Together with 29972149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29972143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986073 + 14986074.

It is an arithmetic number, because the mean of its divisors is an integer number (14986074).

Almost surely, 2^29972147 is an apocalyptic number.

29972147 is a deficient number, since it is larger than the sum of its proper divisors (1).

29972147 is an equidigital number, since it uses as much as digits as its factorization.

29972147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 29972147 is about 5474.6823652154. The cubic root of 29972147 is about 310.6270588789.

The spelling of 29972147 in words is "twenty-nine million, nine hundred seventy-two thousand, one hundred forty-seven".