29731474989 has 6 divisors (see below), whose sum is σ = 42945463886. Its totient is φ = 19820983320.

The previous prime is 29731474963. The next prime is 29731475017. The reversal of 29731474989 is 98947413792.

29731474989 is a `hidden beast` number, since 2 + 9 + 73 + 1 + 474 + 98 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29020826025 + 710648964 = 170355^2 + 26658^2 .

It is not a de Polignac number, because 29731474989 - 2⁸ = 29731474733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29731474909) 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 5 ways as a sum of consecutive naturals, for example, 1651748602 + ... + 1651748619.

Almost surely, 2^29731474989 is an apocalyptic number.

It is an amenable number.

29731474989 is a deficient number, since it is larger than the sum of its proper divisors (13213988897).

29731474989 is a wasteful number, since it uses less digits than its factorization.

29731474989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303497227 (or 3303497224 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 29731474989 in words is "twenty-nine billion, seven hundred thirty-one million, four hundred seventy-four thousand, nine hundred eighty-nine".