312642706 has 4 divisors (see below), whose sum is σ = 468964062. Its totient is φ = 156321352.

The previous prime is 312642683. The next prime is 312642713. The reversal of 312642706 is 607246213.

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

It can be written as a sum of positive squares in only one way, i.e., 238424481 + 74218225 = 15441^2 + 8615^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 78160675 + ... + 78160678.

Almost surely, 2^312642706 is an apocalyptic number.

312642706 is a deficient number, since it is larger than the sum of its proper divisors (156321356).

312642706 is a wasteful number, since it uses less digits than its factorization.

312642706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156321355.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 312642706 is about 17681.7054041741. The cubic root of 312642706 is about 678.7076854103.

Adding to 312642706 its reverse (607246213), we get a palindrome (919888919).

The spelling of 312642706 in words is "three hundred twelve million, six hundred forty-two thousand, seven hundred six".