648693319 has 2 divisors, whose sum is σ = 648693320. Its totient is φ = 648693318.

The previous prime is 648693247. The next prime is 648693323. The reversal of 648693319 is 913396846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648693319 - 2¹¹ = 648691271 is a prime.

It is a super-2 number, since 2×648693319² = 841606044230471522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648693379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324346659 + 324346660.

It is an arithmetic number, because the mean of its divisors is an integer number (324346660).

Almost surely, 2^648693319 is an apocalyptic number.

648693319 is a deficient number, since it is larger than the sum of its proper divisors (1).

648693319 is an equidigital number, since it uses as much as digits as its factorization.

648693319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 648693319 is about 25469.4585533340. The cubic root of 648693319 is about 865.6582553381.

The spelling of 648693319 in words is "six hundred forty-eight million, six hundred ninety-three thousand, three hundred nineteen".