321063978 has 16 divisors (see below), whose sum is σ = 648363456. Its totient is φ = 105982080.

The previous prime is 321063949. The next prime is 321063997. The reversal of 321063978 is 879360123.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259143 + ... + 260378.

It is an arithmetic number, because the mean of its divisors is an integer number (40522716).

Almost surely, 2^321063978 is an apocalyptic number.

321063978 is an abundant number, since it is smaller than the sum of its proper divisors (327299478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321063978 is a wasteful number, since it uses less digits than its factorization.

321063978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519629.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 321063978 is about 17918.2582300848. The cubic root of 321063978 is about 684.7476136999.

The spelling of 321063978 in words is "three hundred twenty-one million, sixty-three thousand, nine hundred seventy-eight".