321671396 has 6 divisors (see below), whose sum is σ = 562924950. Its totient is φ = 160835696.

The previous prime is 321671351. The next prime is 321671401. The reversal of 321671396 is 693176123.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 230736100 + 90935296 = 15190^2 + 9536^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40208921 + ... + 40208928.

It is an arithmetic number, because the mean of its divisors is an integer number (93820825).

Almost surely, 2^321671396 is an apocalyptic number.

It is an amenable number.

321671396 is a deficient number, since it is larger than the sum of its proper divisors (241253554).

321671396 is a wasteful number, since it uses less digits than its factorization.

321671396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80417853 (or 80417851 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 321671396 is about 17935.1999152505. The cubic root of 321671396 is about 685.1791642454.

The spelling of 321671396 in words is "three hundred twenty-one million, six hundred seventy-one thousand, three hundred ninety-six".