312575749 has 4 divisors (see below), whose sum is σ = 312612300. Its totient is φ = 312539200.

The previous prime is 312575723. The next prime is 312575777. The reversal of 312575749 is 947575213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 947575213 = 13 ⋅72890401.

It can be written as a sum of positive squares in 2 ways, for example, as 186732225 + 125843524 = 13665^2 + 11218^2 .

It is a cyclic number.

It is not a de Polignac number, because 312575749 - 2²³ = 304187141 is a prime.

It is a super-2 number, since 2×312575749² = 195407197725822002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312575779) 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, 2199 + ... + 25099.

It is an arithmetic number, because the mean of its divisors is an integer number (78153075).

Almost surely, 2^312575749 is an apocalyptic number.

It is an amenable number.

312575749 is a deficient number, since it is larger than the sum of its proper divisors (36551).

312575749 is a wasteful number, since it uses less digits than its factorization.

312575749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36550.

The product of its digits is 264600, while the sum is 43.

The square root of 312575749 is about 17679.8119051080. The cubic root of 312575749 is about 678.6592302311.

The spelling of 312575749 in words is "three hundred twelve million, five hundred seventy-five thousand, seven hundred forty-nine".