29931999789 has 8 divisors (see below), whose sum is σ = 40662339552. Its totient is φ = 19578163280.

The previous prime is 29931999787. The next prime is 29931999793. The reversal of 29931999789 is 98799913992.

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

It is a cyclic number.

It is not a de Polignac number, because 29931999789 - 2¹ = 29931999787 is a prime.

It is a super-2 number, since 2×29931999789² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 29931999789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29931999787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94125627 + ... + 94125944.

It is an arithmetic number, because the mean of its divisors is an integer number (5082792444).

Almost surely, 2^29931999789 is an apocalyptic number.

It is an amenable number.

29931999789 is a deficient number, since it is larger than the sum of its proper divisors (10730339763).

29931999789 is a wasteful number, since it uses less digits than its factorization.

29931999789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188251627.

The product of its digits is 178564176, while the sum is 75.

The spelling of 29931999789 in words is "twenty-nine billion, nine hundred thirty-one million, nine hundred ninety-nine thousand, seven hundred eighty-nine".