648262519 has 2 divisors, whose sum is σ = 648262520. Its totient is φ = 648262518.

The previous prime is 648262487. The next prime is 648262529. The reversal of 648262519 is 915262846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648262519 - 2⁵ = 648262487 is a prime.

It is a super-2 number, since 2×648262519² = 840488587080450722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648262529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324131259 + 324131260.

It is an arithmetic number, because the mean of its divisors is an integer number (324131260).

Almost surely, 2^648262519 is an apocalyptic number.

648262519 is a deficient number, since it is larger than the sum of its proper divisors (1).

648262519 is an equidigital number, since it uses as much as digits as its factorization.

648262519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 648262519 is about 25460.9999607242. Note that the first 4 decimals coincide. The cubic root of 648262519 is about 865.4665837887.

The spelling of 648262519 in words is "six hundred forty-eight million, two hundred sixty-two thousand, five hundred nineteen".