312609993 has 4 divisors (see below), whose sum is σ = 416813328. Its totient is φ = 208406660.

The previous prime is 312609989. The next prime is 312610009. The reversal of 312609993 is 399906213.

It is a happy number.

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 312609993 - 2² = 312609989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312609943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52101663 + ... + 52101668.

It is an arithmetic number, because the mean of its divisors is an integer number (104203332).

Almost surely, 2^312609993 is an apocalyptic number.

It is an amenable number.

312609993 is a deficient number, since it is larger than the sum of its proper divisors (104203335).

312609993 is a wasteful number, since it uses less digits than its factorization.

312609993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104203334.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 312609993 is about 17680.7803278023. The cubic root of 312609993 is about 678.6840126592.

The spelling of 312609993 in words is "three hundred twelve million, six hundred nine thousand, nine hundred ninety-three".