29968991 has 16 divisors (see below), whose sum is σ = 33657120. Its totient is φ = 26503680.

The previous prime is 29968987. The next prime is 29968993. The reversal of 29968991 is 19986992.

It is a cyclic number.

It is not a de Polignac number, because 29968991 - 2² = 29968987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29968993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30971 + ... + 31923.

It is an arithmetic number, because the mean of its divisors is an integer number (2103570).

Almost surely, 2^29968991 is an apocalyptic number.

29968991 is a deficient number, since it is larger than the sum of its proper divisors (3688129).

29968991 is a wasteful number, since it uses less digits than its factorization.

29968991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its digits is 629856, while the sum is 53.

The square root of 29968991 is about 5474.3941217271. The cubic root of 29968991 is about 310.6161557182.

The spelling of 29968991 in words is "twenty-nine million, nine hundred sixty-eight thousand, nine hundred ninety-one".