72931429289 has 4 divisors (see below), whose sum is σ = 72985017300. Its totient is φ = 72877841280.

The previous prime is 72931429273. The next prime is 72931429303. The reversal of 72931429289 is 98292413927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98292413927 = 3499 ⋅28091573.

It can be written as a sum of positive squares in 2 ways, for example, as 25642577689 + 47288851600 = 160133^2 + 217460^2 .

It is a cyclic number.

It is not a de Polignac number, because 72931429289 - 2⁴ = 72931429273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72931729289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26791964 + ... + 26794685.

It is an arithmetic number, because the mean of its divisors is an integer number (18246254325).

Almost surely, 2^72931429289 is an apocalyptic number.

It is an amenable number.

72931429289 is a deficient number, since it is larger than the sum of its proper divisors (53588011).

72931429289 is a wasteful number, since it uses less digits than its factorization.

72931429289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53588010.

The product of its digits is 3919104, while the sum is 56.

The spelling of 72931429289 in words is "seventy-two billion, nine hundred thirty-one million, four hundred twenty-nine thousand, two hundred eighty-nine".