649242999 has 8 divisors (see below), whose sum is σ = 961841520. Its totient is φ = 432828648.

The previous prime is 649242989. The next prime is 649243009. The reversal of 649242999 is 999242946.

It is an interprime number because it is at equal distance from previous prime (649242989) and next prime (649243009).

It is not a de Polignac number, because 649242999 - 2⁴ = 649242983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649242989) 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 in 7 ways as a sum of consecutive naturals, for example, 12022992 + ... + 12023045.

It is an arithmetic number, because the mean of its divisors is an integer number (120230190).

Almost surely, 2^649242999 is an apocalyptic number.

649242999 is a deficient number, since it is larger than the sum of its proper divisors (312598521).

649242999 is a wasteful number, since it uses less digits than its factorization.

649242999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24046046 (or 24046040 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 649242999 is about 25480.2472319246. The cubic root of 649242999 is about 865.9026958038.

The spelling of 649242999 in words is "six hundred forty-nine million, two hundred forty-two thousand, nine hundred ninety-nine".