29712643 has 2 divisors, whose sum is σ = 29712644. Its totient is φ = 29712642.

The previous prime is 29712593. The next prime is 29712653. The reversal of 29712643 is 34621792.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29712643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29712599 and 29712608.

It is not a weakly prime, because it can be changed into another prime (29712653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14856321 + 14856322.

It is an arithmetic number, because the mean of its divisors is an integer number (14856322).

Almost surely, 2^29712643 is an apocalyptic number.

29712643 is a deficient number, since it is larger than the sum of its proper divisors (1).

29712643 is an equidigital number, since it uses as much as digits as its factorization.

29712643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 29712643 is about 5450.9304710297. The cubic root of 29712643 is about 309.7279715596.

The spelling of 29712643 in words is "twenty-nine million, seven hundred twelve thousand, six hundred forty-three".