72725773 has 4 divisors (see below), whose sum is σ = 73249120. Its totient is φ = 72202428.

The previous prime is 72725743. The next prime is 72725777. The reversal of 72725773 is 37752727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37752727 = 487 ⋅77521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72725773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72725777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261465 + ... + 261742.

It is an arithmetic number, because the mean of its divisors is an integer number (18312280).

Almost surely, 2^72725773 is an apocalyptic number.

It is an amenable number.

72725773 is a deficient number, since it is larger than the sum of its proper divisors (523347).

72725773 is a wasteful number, since it uses less digits than its factorization.

72725773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523346.

The product of its digits is 144060, while the sum is 40.

The square root of 72725773 is about 8527.9407244657. The cubic root of 72725773 is about 417.4099352737.

The spelling of 72725773 in words is "seventy-two million, seven hundred twenty-five thousand, seven hundred seventy-three".