72868847 has 4 divisors (see below), whose sum is σ = 74419296. Its totient is φ = 71318400.

The previous prime is 72868837. The next prime is 72868867. The reversal of 72868847 is 74886827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72868847 - 2²⁰ = 71820271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72868795 and 72868804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72868837) 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, 775154 + ... + 775247.

It is an arithmetic number, because the mean of its divisors is an integer number (18604824).

Almost surely, 2^72868847 is an apocalyptic number.

72868847 is a deficient number, since it is larger than the sum of its proper divisors (1550449).

72868847 is a wasteful number, since it uses less digits than its factorization.

72868847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550448.

The product of its digits is 1204224, while the sum is 50.

The square root of 72868847 is about 8536.3251461036. The cubic root of 72868847 is about 417.6834806138.

The spelling of 72868847 in words is "seventy-two million, eight hundred sixty-eight thousand, eight hundred forty-seven".