72702781223 has 2 divisors, whose sum is σ = 72702781224. Its totient is φ = 72702781222.

The previous prime is 72702781169. The next prime is 72702781241. The reversal of 72702781223 is 32218720727.

It is a strong prime.

It is an emirp because it is prime and its reverse (32218720727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72702781223 - 2⁶ = 72702781159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72702781243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36351390611 + 36351390612.

It is an arithmetic number, because the mean of its divisors is an integer number (36351390612).

Almost surely, 2^72702781223 is an apocalyptic number.

72702781223 is a deficient number, since it is larger than the sum of its proper divisors (1).

72702781223 is an equidigital number, since it uses as much as digits as its factorization.

72702781223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 72702781223 in words is "seventy-two billion, seven hundred two million, seven hundred eighty-one thousand, two hundred twenty-three".