7172405873 has 4 divisors (see below), whose sum is σ = 7172789988. Its totient is φ = 7172021760.

The previous prime is 7172405869. The next prime is 7172405881. The reversal of 7172405873 is 3785042717.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6137625649 + 1034780224 = 78343^2 + 32168^2 .

It is a cyclic number.

It is not a de Polignac number, because 7172405873 - 2² = 7172405869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7172405843) 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, 162536 + ... + 201897.

It is an arithmetic number, because the mean of its divisors is an integer number (1793197497).

Almost surely, 2^7172405873 is an apocalyptic number.

It is an amenable number.

7172405873 is a deficient number, since it is larger than the sum of its proper divisors (384115).

7172405873 is a wasteful number, since it uses less digits than its factorization.

7172405873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384114.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 7172405873 is about 84690.0576986461. The cubic root of 7172405873 is about 1928.5087743546.

The spelling of 7172405873 in words is "seven billion, one hundred seventy-two million, four hundred five thousand, eight hundred seventy-three".