648248503 has 4 divisors (see below), whose sum is σ = 740855440. Its totient is φ = 555641568.

The previous prime is 648248501. The next prime is 648248527. The reversal of 648248503 is 305842846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305842846 = 2 ⋅152921423.

It is a cyclic number.

It is not a de Polignac number, because 648248503 - 2¹ = 648248501 is a prime.

It is a super-2 number, since 2×648248503² = 840452243283482018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648248501) 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, 46303458 + ... + 46303471.

It is an arithmetic number, because the mean of its divisors is an integer number (185213860).

Almost surely, 2^648248503 is an apocalyptic number.

648248503 is a deficient number, since it is larger than the sum of its proper divisors (92606937).

648248503 is an equidigital number, since it uses as much as digits as its factorization.

648248503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92606936.

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 648248503 is about 25460.7247147445. The cubic root of 648248503 is about 865.4603463634.

The spelling of 648248503 in words is "six hundred forty-eight million, two hundred forty-eight thousand, five hundred three".