648992986 has 8 divisors (see below), whose sum is σ = 1030753620. Its totient is φ = 305408448.

The previous prime is 648992983. The next prime is 648992989. The reversal of 648992986 is 689299846.

It is an interprime number because it is at equal distance from previous prime (648992983) and next prime (648992989).

It can be written as a sum of positive squares in 2 ways, for example, as 572692761 + 76300225 = 23931^2 + 8735^2 .

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

It is not an unprimeable number, because it can be changed into a prime (648992983) 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 3 ways as a sum of consecutive naturals, for example, 9543981 + ... + 9544048.

Almost surely, 2^648992986 is an apocalyptic number.

648992986 is a deficient number, since it is larger than the sum of its proper divisors (381760634).

648992986 is a wasteful number, since it uses less digits than its factorization.

648992986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19088048.

The product of its digits is 13436928, while the sum is 61.

The square root of 648992986 is about 25475.3407435504. The cubic root of 648992986 is about 865.7915331495.

The spelling of 648992986 in words is "six hundred forty-eight million, nine hundred ninety-two thousand, nine hundred eighty-six".