72134431333 has 2 divisors, whose sum is σ = 72134431334. Its totient is φ = 72134431332.

The previous prime is 72134431289. The next prime is 72134431349. The reversal of 72134431333 is 33313443127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71463724929 + 670706404 = 267327^2 + 25898^2 .

It is an emirp because it is prime and its reverse (33313443127) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72134431333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72134438333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36067215666 + 36067215667.

It is an arithmetic number, because the mean of its divisors is an integer number (36067215667).

Almost surely, 2^72134431333 is an apocalyptic number.

It is an amenable number.

72134431333 is a deficient number, since it is larger than the sum of its proper divisors (1).

72134431333 is an equidigital number, since it uses as much as digits as its factorization.

72134431333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 34.

The spelling of 72134431333 in words is "seventy-two billion, one hundred thirty-four million, four hundred thirty-one thousand, three hundred thirty-three".