72786893 has 2 divisors, whose sum is σ = 72786894. Its totient is φ = 72786892.

The previous prime is 72786871. The next prime is 72786899. The reversal of 72786893 is 39868727.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72624484 + 162409 = 8522^2 + 403^2 .

It is an emirp because it is prime and its reverse (39868727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72786893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72786899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36393446 + 36393447.

It is an arithmetic number, because the mean of its divisors is an integer number (36393447).

Almost surely, 2^72786893 is an apocalyptic number.

It is an amenable number.

72786893 is a deficient number, since it is larger than the sum of its proper divisors (1).

72786893 is an equidigital number, since it uses as much as digits as its factorization.

72786893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 72786893 is about 8531.5234864589. The cubic root of 72786893 is about 417.5268353793.

The spelling of 72786893 in words is "seventy-two million, seven hundred eighty-six thousand, eight hundred ninety-three".