321673972 has 6 divisors (see below), whose sum is σ = 562929458. Its totient is φ = 160836984.

The previous prime is 321673909. The next prime is 321673973. The reversal of 321673972 is 279376123.

It can be written as a sum of positive squares in only one way, i.e., 316982416 + 4691556 = 17804^2 + 2166^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321673973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40209243 + ... + 40209250.

Almost surely, 2^321673972 is an apocalyptic number.

It is an amenable number.

321673972 is a deficient number, since it is larger than the sum of its proper divisors (241255486).

321673972 is a wasteful number, since it uses less digits than its factorization.

321673972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80418497 (or 80418495 counting only the distinct ones).

The product of its digits is 95256, while the sum is 40.

The square root of 321673972 is about 17935.2717291933. The cubic root of 321673972 is about 685.1809932515.

The spelling of 321673972 in words is "three hundred twenty-one million, six hundred seventy-three thousand, nine hundred seventy-two".