71172003787 has 4 divisors (see below), whose sum is σ = 71540770840. Its totient is φ = 70803236736.

The previous prime is 71172003751. The next prime is 71172003811. The reversal of 71172003787 is 78730027117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78730027117 = 7 ⋅11247146731.

It is a cyclic number.

It is not a de Polignac number, because 71172003787 - 2⁷ = 71172003659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71172003587) 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, 184383237 + ... + 184383622.

It is an arithmetic number, because the mean of its divisors is an integer number (17885192710).

Almost surely, 2^71172003787 is an apocalyptic number.

71172003787 is a deficient number, since it is larger than the sum of its proper divisors (368767053).

71172003787 is a wasteful number, since it uses less digits than its factorization.

71172003787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368767052.

The product of its (nonzero) digits is 115248, while the sum is 43.

The spelling of 71172003787 in words is "seventy-one billion, one hundred seventy-two million, three thousand, seven hundred eighty-seven".