29661923 has 4 divisors (see below), whose sum is σ = 31406760. Its totient is φ = 27917088.

The previous prime is 29661917. The next prime is 29661953. The reversal of 29661923 is 32916692.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29661923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29661953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872393 + ... + 872426.

It is an arithmetic number, because the mean of its divisors is an integer number (7851690).

Almost surely, 2^29661923 is an apocalyptic number.

29661923 is a deficient number, since it is larger than the sum of its proper divisors (1744837).

29661923 is a wasteful number, since it uses less digits than its factorization.

29661923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744836.

The product of its digits is 34992, while the sum is 38.

The square root of 29661923 is about 5446.2760671857. The cubic root of 29661923 is about 309.5516341674.

The spelling of 29661923 in words is "twenty-nine million, six hundred sixty-one thousand, nine hundred twenty-three".