72563473 has 4 divisors (see below), whose sum is σ = 72821988. Its totient is φ = 72304960.

The previous prime is 72563471. The next prime is 72563483. The reversal of 72563473 is 37436527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37436527 = 557 ⋅67211.

It can be written as a sum of positive squares in 2 ways, for example, as 65011969 + 7551504 = 8063^2 + 2748^2 .

It is a cyclic number.

It is not a de Polignac number, because 72563473 - 2¹ = 72563471 is a prime.

It is a super-2 number, since 2×72563473² = 10530915227643458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72563471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128836 + ... + 129397.

It is an arithmetic number, because the mean of its divisors is an integer number (18205497).

Almost surely, 2^72563473 is an apocalyptic number.

It is an amenable number.

72563473 is a deficient number, since it is larger than the sum of its proper divisors (258515).

72563473 is a wasteful number, since it uses less digits than its factorization.

72563473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258514.

The product of its digits is 105840, while the sum is 37.

The square root of 72563473 is about 8518.4196304244. The cubic root of 72563473 is about 417.0991967849.

The spelling of 72563473 in words is "seventy-two million, five hundred sixty-three thousand, four hundred seventy-three".