72847507 has 4 divisors (see below), whose sum is σ = 75359520. Its totient is φ = 70335496.

The previous prime is 72847483. The next prime is 72847517. The reversal of 72847507 is 70574827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70574827 = 331 ⋅213217.

It is a cyclic number.

It is not a de Polignac number, because 72847507 - 2²³ = 64458899 is a prime.

It is a super-2 number, since 2×72847507² = 10613518552230098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72847507.

It is not an unprimeable number, because it can be changed into a prime (72847517) 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, 1255963 + ... + 1256020.

It is an arithmetic number, because the mean of its divisors is an integer number (18839880).

Almost surely, 2^72847507 is an apocalyptic number.

72847507 is a deficient number, since it is larger than the sum of its proper divisors (2512013).

72847507 is a wasteful number, since it uses less digits than its factorization.

72847507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512012.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 72847507 is about 8535.0751021886. The cubic root of 72847507 is about 417.6427030795.

The spelling of 72847507 in words is "seventy-two million, eight hundred forty-seven thousand, five hundred seven".