72845827 has 4 divisors (see below), whose sum is σ = 74539960. Its totient is φ = 71151696.

The previous prime is 72845813. The next prime is 72845831. The reversal of 72845827 is 72854827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72845827 is a prime.

It is a super-2 number, since 2×72845827² = 10613029022627858, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1694089 = 72845827 / (7 + 2 + 8 + 4 + 5 + 8 + 2 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72845327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847002 + ... + 847087.

It is an arithmetic number, because the mean of its divisors is an integer number (18634990).

Almost surely, 2^72845827 is an apocalyptic number.

72845827 is a deficient number, since it is larger than the sum of its proper divisors (1694133).

72845827 is a wasteful number, since it uses less digits than its factorization.

72845827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694132.

The product of its digits is 250880, while the sum is 43.

The square root of 72845827 is about 8534.9766842095. The cubic root of 72845827 is about 417.6394925138.

The spelling of 72845827 in words is "seventy-two million, eight hundred forty-five thousand, eight hundred twenty-seven".