649710619 has 2 divisors, whose sum is σ = 649710620. Its totient is φ = 649710618.

The previous prime is 649710583. The next prime is 649710629. The reversal of 649710619 is 916017946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649710619 - 2⁹ = 649710107 is a prime.

It is a super-2 number, since 2×649710619² = 844247776882726322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (649710629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324855309 + 324855310.

It is an arithmetic number, because the mean of its divisors is an integer number (324855310).

Almost surely, 2^649710619 is an apocalyptic number.

649710619 is a deficient number, since it is larger than the sum of its proper divisors (1).

649710619 is an equidigital number, since it uses as much as digits as its factorization.

649710619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 649710619 is about 25489.4217078379. The cubic root of 649710619 is about 866.1105359318.

The spelling of 649710619 in words is "six hundred forty-nine million, seven hundred ten thousand, six hundred nineteen".