648769679 has 2 divisors, whose sum is σ = 648769680. Its totient is φ = 648769678.

The previous prime is 648769673. The next prime is 648769699. The reversal of 648769679 is 976967846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648769679 - 2¹⁶ = 648704143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648769673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324384839 + 324384840.

It is an arithmetic number, because the mean of its divisors is an integer number (324384840).

Almost surely, 2^648769679 is an apocalyptic number.

648769679 is a deficient number, since it is larger than the sum of its proper divisors (1).

648769679 is an equidigital number, since it uses as much as digits as its factorization.

648769679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 62.

The square root of 648769679 is about 25470.9575595422. The cubic root of 648769679 is about 865.6922205771.

The spelling of 648769679 in words is "six hundred forty-eight million, seven hundred sixty-nine thousand, six hundred seventy-nine".