72056773 has 2 divisors, whose sum is σ = 72056774. Its totient is φ = 72056772.

The previous prime is 72056771. The next prime is 72056779. The reversal of 72056773 is 37765027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55920484 + 16136289 = 7478^2 + 4017^2 .

It is a cyclic number.

It is not a de Polignac number, because 72056773 - 2¹ = 72056771 is a prime.

Together with 72056771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72056771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36028386 + 36028387.

It is an arithmetic number, because the mean of its divisors is an integer number (36028387).

Almost surely, 2^72056773 is an apocalyptic number.

It is an amenable number.

72056773 is a deficient number, since it is larger than the sum of its proper divisors (1).

72056773 is an equidigital number, since it uses as much as digits as its factorization.

72056773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 37.

The square root of 72056773 is about 8488.6260961359. The cubic root of 72056773 is about 416.1260808819.

The spelling of 72056773 in words is "seventy-two million, fifty-six thousand, seven hundred seventy-three".