72135493 has 2 divisors, whose sum is σ = 72135494. Its totient is φ = 72135492.

The previous prime is 72135473. The next prime is 72135541. The reversal of 72135493 is 39453127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69255684 + 2879809 = 8322^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 72135493 - 2¹³ = 72127301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72135433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36067746 + 36067747.

It is an arithmetic number, because the mean of its divisors is an integer number (36067747).

Almost surely, 2^72135493 is an apocalyptic number.

It is an amenable number.

72135493 is a deficient number, since it is larger than the sum of its proper divisors (1).

72135493 is an equidigital number, since it uses as much as digits as its factorization.

72135493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 72135493 is about 8493.2616231928. The cubic root of 72135493 is about 416.2775610833.

The spelling of 72135493 in words is "seventy-two million, one hundred thirty-five thousand, four hundred ninety-three".