312404263 has 4 divisors (see below), whose sum is σ = 313183728. Its totient is φ = 311624800.

The previous prime is 312404231. The next prime is 312404273. The reversal of 312404263 is 362404213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312404263 - 2⁵ = 312404231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312404273) 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, 389131 + ... + 389932.

It is an arithmetic number, because the mean of its divisors is an integer number (78295932).

Almost surely, 2^312404263 is an apocalyptic number.

312404263 is a deficient number, since it is larger than the sum of its proper divisors (779465).

312404263 is an equidigital number, since it uses as much as digits as its factorization.

312404263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779464.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 312404263 is about 17674.9614709622. The cubic root of 312404263 is about 678.5350983509.

Adding to 312404263 its reverse (362404213), we get a palindrome (674808476).

The spelling of 312404263 in words is "three hundred twelve million, four hundred four thousand, two hundred sixty-three".