72804071 has 4 divisors (see below), whose sum is σ = 72825312. Its totient is φ = 72782832.

The previous prime is 72804041. The next prime is 72804077. The reversal of 72804071 is 17040827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17040827 = 757 ⋅22511.

It is a cyclic number.

It is not a de Polignac number, because 72804071 - 2²² = 68609767 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 (72804077) 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, 4175 + ... + 12768.

It is an arithmetic number, because the mean of its divisors is an integer number (18206328).

Almost surely, 2^72804071 is an apocalyptic number.

72804071 is a deficient number, since it is larger than the sum of its proper divisors (21241).

72804071 is a wasteful number, since it uses less digits than its factorization.

72804071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21240.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72804071 is about 8532.5301640252. The cubic root of 72804071 is about 417.5596788008.

Adding to 72804071 its reverse (17040827), we get a palindrome (89844898).

The spelling of 72804071 in words is "seventy-two million, eight hundred four thousand, seventy-one".