29987278993 has 8 divisors (see below), whose sum is σ = 34603906688. Its totient is φ = 25453833984.

The previous prime is 29987278973. The next prime is 29987279033. The reversal of 29987278993 is 39987278992.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29987278993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29987278943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20794896 + ... + 20796337.

It is an arithmetic number, because the mean of its divisors is an integer number (4325488336).

Almost surely, 2^29987278993 is an apocalyptic number.

It is an amenable number.

29987278993 is a deficient number, since it is larger than the sum of its proper divisors (4616627695).

29987278993 is a wasteful number, since it uses less digits than its factorization.

29987278993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41591343.

The product of its digits is 246903552, while the sum is 73.

Subtracting 29987278993 from its reverse (39987278992), we obtain a palindrome (9999999999).

The spelling of 29987278993 in words is "twenty-nine billion, nine hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred ninety-three".