648173167 has 4 divisors (see below), whose sum is σ = 652904496. Its totient is φ = 643441840.

The previous prime is 648173159. The next prime is 648173179. The reversal of 648173167 is 761371846.

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

It is a cyclic number.

It is not a de Polignac number, because 648173167 - 2³ = 648173159 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 (648173107) 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, 2365459 + ... + 2365732.

It is an arithmetic number, because the mean of its divisors is an integer number (163226124).

Almost surely, 2^648173167 is an apocalyptic number.

648173167 is a deficient number, since it is larger than the sum of its proper divisors (4731329).

648173167 is a wasteful number, since it uses less digits than its factorization.

648173167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731328.

The product of its digits is 169344, while the sum is 43.

The square root of 648173167 is about 25459.2452166202. The cubic root of 648173167 is about 865.4268186621.

The spelling of 648173167 in words is "six hundred forty-eight million, one hundred seventy-three thousand, one hundred sixty-seven".