312810149 has 4 divisors (see below), whose sum is σ = 331210764. Its totient is φ = 294409536.

The previous prime is 312810077. The next prime is 312810161. The reversal of 312810149 is 941018213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941018213 = 739 ⋅1273367.

It can be written as a sum of positive squares in 2 ways, for example, as 170485249 + 142324900 = 13057^2 + 11930^2 .

It is a de Polignac number, because none of the positive numbers 2^k-312810149 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 (312810049) 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, 9200282 + ... + 9200315.

It is an arithmetic number, because the mean of its divisors is an integer number (82802691).

Almost surely, 2^312810149 is an apocalyptic number.

It is an amenable number.

312810149 is a deficient number, since it is larger than the sum of its proper divisors (18400615).

312810149 is a wasteful number, since it uses less digits than its factorization.

312810149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18400614.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 312810149 is about 17686.4396926007. The cubic root of 312810149 is about 678.8288296286.

The spelling of 312810149 in words is "three hundred twelve million, eight hundred ten thousand, one hundred forty-nine".