312690646 has 4 divisors (see below), whose sum is σ = 469035972. Its totient is φ = 156345322.

The previous prime is 312690643. The next prime is 312690659. The reversal of 312690646 is 646096213.

It is a happy number.

312690646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312690643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78172660 + ... + 78172663.

It is an arithmetic number, because the mean of its divisors is an integer number (117258993).

Almost surely, 2^312690646 is an apocalyptic number.

312690646 is a deficient number, since it is larger than the sum of its proper divisors (156345326).

312690646 is a wasteful number, since it uses less digits than its factorization.

312690646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156345325.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 312690646 is about 17683.0609906769. The cubic root of 312690646 is about 678.7423741918.

The spelling of 312690646 in words is "three hundred twelve million, six hundred ninety thousand, six hundred forty-six".