648770719 has 2 divisors, whose sum is σ = 648770720. Its totient is φ = 648770718.

The previous prime is 648770693. The next prime is 648770723. The reversal of 648770719 is 917077846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648770719 - 2⁹ = 648770207 is a prime.

It is a super-2 number, since 2×648770719² = 841806891663553922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648770119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324385359 + 324385360.

It is an arithmetic number, because the mean of its divisors is an integer number (324385360).

Almost surely, 2^648770719 is an apocalyptic number.

648770719 is a deficient number, since it is larger than the sum of its proper divisors (1).

648770719 is an equidigital number, since it uses as much as digits as its factorization.

648770719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 648770719 is about 25470.9779749424. The cubic root of 648770719 is about 865.6926831549.

The spelling of 648770719 in words is "six hundred forty-eight million, seven hundred seventy thousand, seven hundred nineteen".