648769279 has 2 divisors, whose sum is σ = 648769280. Its totient is φ = 648769278.

The previous prime is 648769259. The next prime is 648769291. The reversal of 648769279 is 972967846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648769279 - 2¹⁹ = 648244991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648769259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324384639 + 324384640.

It is an arithmetic number, because the mean of its divisors is an integer number (324384640).

Almost surely, 2^648769279 is an apocalyptic number.

648769279 is a deficient number, since it is larger than the sum of its proper divisors (1).

648769279 is an equidigital number, since it uses as much as digits as its factorization.

648769279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 58.

The square root of 648769279 is about 25470.9497074609. The cubic root of 648769279 is about 865.6920426624.

The spelling of 648769279 in words is "six hundred forty-eight million, seven hundred sixty-nine thousand, two hundred seventy-nine".