72644063 has 2 divisors, whose sum is σ = 72644064. Its totient is φ = 72644062.

The previous prime is 72644053. The next prime is 72644083. The reversal of 72644063 is 36044627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72644063 - 2¹² = 72639967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72644003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322031 + 36322032.

It is an arithmetic number, because the mean of its divisors is an integer number (36322032).

Almost surely, 2^72644063 is an apocalyptic number.

72644063 is a deficient number, since it is larger than the sum of its proper divisors (1).

72644063 is an equidigital number, since it uses as much as digits as its factorization.

72644063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 72644063 is about 8523.1486552799. The cubic root of 72644063 is about 417.2535517079.

The spelling of 72644063 in words is "seventy-two million, six hundred forty-four thousand, sixty-three".