653643982 has 8 divisors (see below), whose sum is σ = 1038140496. Its totient is φ = 307597152.

The previous prime is 653643953. The next prime is 653643983. The reversal of 653643982 is 289346356.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653643983) 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, 9612378 + ... + 9612445.

It is an arithmetic number, because the mean of its divisors is an integer number (129767562).

Almost surely, 2^653643982 is an apocalyptic number.

653643982 is a deficient number, since it is larger than the sum of its proper divisors (384496514).

653643982 is a wasteful number, since it uses less digits than its factorization.

653643982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224842.

The product of its digits is 933120, while the sum is 46.

The square root of 653643982 is about 25566.4620548092. The cubic root of 653643982 is about 867.8548383256.

The spelling of 653643982 in words is "six hundred fifty-three million, six hundred forty-three thousand, nine hundred eighty-two".