72844091 has 4 divisors (see below), whose sum is σ = 72911592. Its totient is φ = 72776592.

The previous prime is 72844067. The next prime is 72844103. The reversal of 72844091 is 19044827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19044827 = 71 ⋅268237.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72844091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72844001) 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, 32105 + ... + 34298.

It is an arithmetic number, because the mean of its divisors is an integer number (18227898).

Almost surely, 2^72844091 is an apocalyptic number.

72844091 is a deficient number, since it is larger than the sum of its proper divisors (67501).

72844091 is a wasteful number, since it uses less digits than its factorization.

72844091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67500.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 72844091 is about 8534.8749844388. The cubic root of 72844091 is about 417.6361748773.

The spelling of 72844091 in words is "seventy-two million, eight hundred forty-four thousand, ninety-one".