648394079 has 2 divisors, whose sum is σ = 648394080. Its totient is φ = 648394078.

The previous prime is 648394067. The next prime is 648394099. The reversal of 648394079 is 970493846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648394079 - 2²⁴ = 631616863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648394009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324197039 + 324197040.

It is an arithmetic number, because the mean of its divisors is an integer number (324197040).

Almost surely, 2^648394079 is an apocalyptic number.

648394079 is a deficient number, since it is larger than the sum of its proper divisors (1).

648394079 is an equidigital number, since it uses as much as digits as its factorization.

648394079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 648394079 is about 25463.5833888320. The cubic root of 648394079 is about 865.5251264721.

The spelling of 648394079 in words is "six hundred forty-eight million, three hundred ninety-four thousand, seventy-nine".