72771323 has 2 divisors, whose sum is σ = 72771324. Its totient is φ = 72771322.

The previous prime is 72771317. The next prime is 72771383. The reversal of 72771323 is 32317727.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72771323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72771323.

It is not a weakly prime, because it can be changed into another prime (72771383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36385661 + 36385662.

It is an arithmetic number, because the mean of its divisors is an integer number (36385662).

Almost surely, 2^72771323 is an apocalyptic number.

72771323 is a deficient number, since it is larger than the sum of its proper divisors (1).

72771323 is an equidigital number, since it uses as much as digits as its factorization.

72771323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348, while the sum is 32.

The square root of 72771323 is about 8530.6109394345. The cubic root of 72771323 is about 417.4970619034.

The spelling of 72771323 in words is "seventy-two million, seven hundred seventy-one thousand, three hundred twenty-three".