72520573 has 2 divisors, whose sum is σ = 72520574. Its totient is φ = 72520572.

The previous prime is 72520559. The next prime is 72520627. The reversal of 72520573 is 37502527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68608089 + 3912484 = 8283^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 72520573 - 2²¹ = 70423421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72520543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36260286 + 36260287.

It is an arithmetic number, because the mean of its divisors is an integer number (36260287).

Almost surely, 2^72520573 is an apocalyptic number.

It is an amenable number.

72520573 is a deficient number, since it is larger than the sum of its proper divisors (1).

72520573 is an equidigital number, since it uses as much as digits as its factorization.

72520573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 72520573 is about 8515.9011854295. The cubic root of 72520573 is about 417.0169833230.

The spelling of 72520573 in words is "seventy-two million, five hundred twenty thousand, five hundred seventy-three".