312804321 has 4 divisors (see below), whose sum is σ = 417072432. Its totient is φ = 208536212.

The previous prime is 312804313. The next prime is 312804337. The reversal of 312804321 is 123408213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312804321 - 2³ = 312804313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312804291 and 312804300.

It is not an unprimeable number, because it can be changed into a prime (312804361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52134051 + ... + 52134056.

It is an arithmetic number, because the mean of its divisors is an integer number (104268108).

Almost surely, 2^312804321 is an apocalyptic number.

It is an amenable number.

312804321 is a deficient number, since it is larger than the sum of its proper divisors (104268111).

312804321 is a wasteful number, since it uses less digits than its factorization.

312804321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104268110.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 312804321 is about 17686.2749328399. The cubic root of 312804321 is about 678.8246138244.

The spelling of 312804321 in words is "three hundred twelve million, eight hundred four thousand, three hundred twenty-one".