72839131 has 2 divisors, whose sum is σ = 72839132. Its totient is φ = 72839130.

The previous prime is 72839093. The next prime is 72839147. The reversal of 72839131 is 13193827.

It is a strong prime.

It is an emirp because it is prime and its reverse (13193827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72839131 - 2¹³ = 72830939 is a prime.

It is a super-2 number, since 2×72839131² = 10611078009670322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72839171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36419565 + 36419566.

It is an arithmetic number, because the mean of its divisors is an integer number (36419566).

Almost surely, 2^72839131 is an apocalyptic number.

72839131 is a deficient number, since it is larger than the sum of its proper divisors (1).

72839131 is an equidigital number, since it uses as much as digits as its factorization.

72839131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 72839131 is about 8534.5844069878. The cubic root of 72839131 is about 417.6266956255.

The spelling of 72839131 in words is "seventy-two million, eight hundred thirty-nine thousand, one hundred thirty-one".