72782771 has 2 divisors, whose sum is σ = 72782772. Its totient is φ = 72782770.

The previous prime is 72782747. The next prime is 72782803. The reversal of 72782771 is 17728727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72782771 - 2¹⁰ = 72781747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72782701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36391385 + 36391386.

It is an arithmetic number, because the mean of its divisors is an integer number (36391386).

Almost surely, 2^72782771 is an apocalyptic number.

72782771 is a deficient number, since it is larger than the sum of its proper divisors (1).

72782771 is an equidigital number, since it uses as much as digits as its factorization.

72782771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76832, while the sum is 41.

The square root of 72782771 is about 8531.2819083652. The cubic root of 72782771 is about 417.5189535660.

The spelling of 72782771 in words is "seventy-two million, seven hundred eighty-two thousand, seven hundred seventy-one".