29913931 has 4 divisors (see below), whose sum is σ = 31673592. Its totient is φ = 28154272.

The previous prime is 29913907. The next prime is 29913937. The reversal of 29913931 is 13931992.

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

It is a cyclic number.

It is not a de Polignac number, because 29913931 - 2¹¹ = 29911883 is a prime.

It is a super-2 number, since 2×29913931² = 1789686535745522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29913937) 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, 879805 + ... + 879838.

It is an arithmetic number, because the mean of its divisors is an integer number (7918398).

Almost surely, 2^29913931 is an apocalyptic number.

29913931 is a deficient number, since it is larger than the sum of its proper divisors (1759661).

29913931 is a wasteful number, since it uses less digits than its factorization.

29913931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759660.

The product of its digits is 13122, while the sum is 37.

The square root of 29913931 is about 5469.3629427932. The cubic root of 29913931 is about 310.4258144194.

The spelling of 29913931 in words is "twenty-nine million, nine hundred thirteen thousand, nine hundred thirty-one".