72820063 has 2 divisors, whose sum is σ = 72820064. Its totient is φ = 72820062.

The previous prime is 72820043. The next prime is 72820079. The reversal of 72820063 is 36002827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72820063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72820043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36410031 + 36410032.

It is an arithmetic number, because the mean of its divisors is an integer number (36410032).

Almost surely, 2^72820063 is an apocalyptic number.

72820063 is a deficient number, since it is larger than the sum of its proper divisors (1).

72820063 is an equidigital number, since it uses as much as digits as its factorization.

72820063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72820063 is about 8533.4672320224. The cubic root of 72820063 is about 417.5902500103.

The spelling of 72820063 in words is "seventy-two million, eight hundred twenty thousand, sixty-three".