648173497 has 16 divisors (see below), whose sum is σ = 668344320. Its totient is φ = 628411392.

The previous prime is 648173483. The next prime is 648173549. The reversal of 648173497 is 794371846.

It is a cyclic number.

It is not a de Polignac number, because 648173497 - 2⁷ = 648173369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648173497.

It is not an unprimeable number, because it can be changed into a prime (648273497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1692168 + ... + 1692550.

It is an arithmetic number, because the mean of its divisors is an integer number (41771520).

Almost surely, 2^648173497 is an apocalyptic number.

It is an amenable number.

648173497 is a deficient number, since it is larger than the sum of its proper divisors (20170823).

648173497 is a wasteful number, since it uses less digits than its factorization.

648173497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its digits is 1016064, while the sum is 49.

The square root of 648173497 is about 25459.2516975657. The cubic root of 648173497 is about 865.4269655317.

It can be divided in two parts, 6 and 48173497, that multiplied together give a palindrome (289040982).

The spelling of 648173497 in words is "six hundred forty-eight million, one hundred seventy-three thousand, four hundred ninety-seven".