649707998 has 8 divisors (see below), whose sum is σ = 976501008. Its totient is φ = 324207664.

The previous prime is 649707943. The next prime is 649708001. The reversal of 649707998 is 899707946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 321911 + ... + 323922.

It is an arithmetic number, because the mean of its divisors is an integer number (122062626).

Almost surely, 2^649707998 is an apocalyptic number.

649707998 is a deficient number, since it is larger than the sum of its proper divisors (326793010).

649707998 is a wasteful number, since it uses less digits than its factorization.

649707998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646338.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The square root of 649707998 is about 25489.3702943011. The cubic root of 649707998 is about 866.1093712703.

The spelling of 649707998 in words is "six hundred forty-nine million, seven hundred seven thousand, nine hundred ninety-eight".