312404405 has 4 divisors (see below), whose sum is σ = 374885292. Its totient is φ = 249923520.

The previous prime is 312404401. The next prime is 312404471. The reversal of 312404405 is 504404213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94517284 + 217887121 = 9722^2 + 14761^2 .

It is not a de Polignac number, because 312404405 - 2² = 312404401 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 (312404401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31240436 + ... + 31240445.

It is an arithmetic number, because the mean of its divisors is an integer number (93721323).

Almost surely, 2^312404405 is an apocalyptic number.

It is an amenable number.

312404405 is a deficient number, since it is larger than the sum of its proper divisors (62480887).

312404405 is an equidigital number, since it uses as much as digits as its factorization.

312404405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62480886.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 312404405 is about 17674.9654879437. The cubic root of 312404405 is about 678.5352011579.

Adding to 312404405 its reverse (504404213), we get a palindrome (816808618).

The spelling of 312404405 in words is "three hundred twelve million, four hundred four thousand, four hundred five".