649157519 has 2 divisors, whose sum is σ = 649157520. Its totient is φ = 649157518.

The previous prime is 649157513. The next prime is 649157527. The reversal of 649157519 is 915751946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649157519 - 2⁸ = 649157263 is a prime.

It is a super-2 number, since 2×649157519² = 842810968948470722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649157513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324578759 + 324578760.

It is an arithmetic number, because the mean of its divisors is an integer number (324578760).

Almost surely, 2^649157519 is an apocalyptic number.

649157519 is a deficient number, since it is larger than the sum of its proper divisors (1).

649157519 is an equidigital number, since it uses as much as digits as its factorization.

649157519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 649157519 is about 25478.5697989506. The cubic root of 649157519 is about 865.8646922565.

The spelling of 649157519 in words is "six hundred forty-nine million, one hundred fifty-seven thousand, five hundred nineteen".