312403447 has 4 divisors (see below), whose sum is σ = 314472496. Its totient is φ = 310334400.

The previous prime is 312403433. The next prime is 312403459. The reversal of 312403447 is 744304213.

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 312403447 - 2²⁷ = 178185719 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 (312403547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034298 + ... + 1034599.

It is an arithmetic number, because the mean of its divisors is an integer number (78618124).

Almost surely, 2^312403447 is an apocalyptic number.

312403447 is a deficient number, since it is larger than the sum of its proper divisors (2069049).

312403447 is a wasteful number, since it uses less digits than its factorization.

312403447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069048.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 312403447 is about 17674.9383874457. The cubic root of 312403447 is about 678.5345075725.

The spelling of 312403447 in words is "three hundred twelve million, four hundred three thousand, four hundred forty-seven".