72055073 has 2 divisors, whose sum is σ = 72055074. Its totient is φ = 72055072.

The previous prime is 72055069. The next prime is 72055099. The reversal of 72055073 is 37055027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 4700224 = 8207^2 + 2168^2 .

It is a cyclic number.

It is not a de Polignac number, because 72055073 - 2² = 72055069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72055003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36027536 + 36027537.

It is an arithmetic number, because the mean of its divisors is an integer number (36027537).

Almost surely, 2^72055073 is an apocalyptic number.

It is an amenable number.

72055073 is a deficient number, since it is larger than the sum of its proper divisors (1).

72055073 is an equidigital number, since it uses as much as digits as its factorization.

72055073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 72055073 is about 8488.5259615554. The cubic root of 72055073 is about 416.1228083702.

The spelling of 72055073 in words is "seventy-two million, fifty-five thousand, seventy-three".