312066649 has 4 divisors (see below), whose sum is σ = 312320164. Its totient is φ = 311813136.

The previous prime is 312066641. The next prime is 312066701. The reversal of 312066649 is 946660213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946660213 = 14639 ⋅64667.

It can be written as a sum of positive squares in 2 ways, for example, as 171217225 + 140849424 = 13085^2 + 11868^2 .

It is a cyclic number.

It is not a de Polignac number, because 312066649 - 2³ = 312066641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312066641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124902 + ... + 127375.

It is an arithmetic number, because the mean of its divisors is an integer number (78080041).

Almost surely, 2^312066649 is an apocalyptic number.

It is an amenable number.

312066649 is a deficient number, since it is larger than the sum of its proper divisors (253515).

312066649 is a wasteful number, since it uses less digits than its factorization.

312066649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253514.

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

The square root of 312066649 is about 17665.4082602130. The cubic root of 312066649 is about 678.2905802181.

The spelling of 312066649 in words is "three hundred twelve million, sixty-six thousand, six hundred forty-nine".