29978993 has 8 divisors (see below), whose sum is σ = 32914560. Its totient is φ = 27078480.

The previous prime is 29978981. The next prime is 29979029. The reversal of 29978993 is 39987992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29978993 - 2⁸ = 29978737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29978933) 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 7 ways as a sum of consecutive naturals, for example, 6953 + ... + 10406.

It is an arithmetic number, because the mean of its divisors is an integer number (4114320).

Almost surely, 2^29978993 is an apocalyptic number.

It is an amenable number.

29978993 is a deficient number, since it is larger than the sum of its proper divisors (2935567).

29978993 is a wasteful number, since it uses less digits than its factorization.

29978993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17527.

The product of its digits is 2204496, while the sum is 56.

The square root of 29978993 is about 5475.3075712694. The cubic root of 29978993 is about 310.6507074012.

The spelling of 29978993 in words is "twenty-nine million, nine hundred seventy-eight thousand, nine hundred ninety-three".