71825791 has 4 divisors (see below), whose sum is σ = 74142784. Its totient is φ = 69508800.

The previous prime is 71825753. The next prime is 71825797. The reversal of 71825791 is 19752817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19752817 = 7 ⋅2821831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71825791 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 (71825797) 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, 1158450 + ... + 1158511.

It is an arithmetic number, because the mean of its divisors is an integer number (18535696).

Almost surely, 2^71825791 is an apocalyptic number.

71825791 is a deficient number, since it is larger than the sum of its proper divisors (2316993).

71825791 is a wasteful number, since it uses less digits than its factorization.

71825791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316992.

The product of its digits is 35280, while the sum is 40.

The square root of 71825791 is about 8475.0097935047. The cubic root of 71825791 is about 415.6809664849.

The spelling of 71825791 in words is "seventy-one million, eight hundred twenty-five thousand, seven hundred ninety-one".