29972731 has 2 divisors, whose sum is σ = 29972732. Its totient is φ = 29972730.

The previous prime is 29972729. The next prime is 29972737. The reversal of 29972731 is 13727992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29972731 - 2¹ = 29972729 is a prime.

It is a super-2 number, since 2×29972731² = 1796729207196722, which contains 22 as substring.

Together with 29972729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (29972737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986365 + 14986366.

It is an arithmetic number, because the mean of its divisors is an integer number (14986366).

Almost surely, 2^29972731 is an apocalyptic number.

29972731 is a deficient number, since it is larger than the sum of its proper divisors (1).

29972731 is an equidigital number, since it uses as much as digits as its factorization.

29972731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 29972731 is about 5474.7357013832. The cubic root of 29972731 is about 310.6290763634.

It can be divided in two parts, 29972 and 731, that added together give a palindrome (30703).

The spelling of 29972731 in words is "twenty-nine million, nine hundred seventy-two thousand, seven hundred thirty-one".