72653785 has 4 divisors (see below), whose sum is σ = 87184548. Its totient is φ = 58123024.

The previous prime is 72653783. The next prime is 72653807. The reversal of 72653785 is 58735627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58735627 = 3307 ⋅17761.

It can be written as a sum of positive squares in 2 ways, for example, as 37417689 + 35236096 = 6117^2 + 5936^2 .

It is a cyclic number.

It is not a de Polignac number, because 72653785 - 2¹ = 72653783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72653783) 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, 7265374 + ... + 7265383.

It is an arithmetic number, because the mean of its divisors is an integer number (21796137).

Almost surely, 2^72653785 is an apocalyptic number.

It is an amenable number.

72653785 is a deficient number, since it is larger than the sum of its proper divisors (14530763).

72653785 is a wasteful number, since it uses less digits than its factorization.

72653785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14530762.

The product of its digits is 352800, while the sum is 43.

The square root of 72653785 is about 8523.7189653343. The cubic root of 72653785 is about 417.2721646448.

The spelling of 72653785 in words is "seventy-two million, six hundred fifty-three thousand, seven hundred eighty-five".