312124013 has 4 divisors (see below), whose sum is σ = 322886940. Its totient is φ = 301361088.

The previous prime is 312123997. The next prime is 312124031. The reversal of 312124013 is 310421213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56220004 + 255904009 = 7498^2 + 15997^2 .

It is a cyclic number.

It is not a de Polignac number, because 312124013 - 2⁴ = 312123997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312123982 and 312124000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381420 + ... + 5381477.

It is an arithmetic number, because the mean of its divisors is an integer number (80721735).

Almost surely, 2^312124013 is an apocalyptic number.

It is an amenable number.

312124013 is a deficient number, since it is larger than the sum of its proper divisors (10762927).

312124013 is a wasteful number, since it uses less digits than its factorization.

312124013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10762926.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312124013 is about 17667.0318106919. The cubic root of 312124013 is about 678.3321387303.

Adding to 312124013 its reverse (310421213), we get a palindrome (622545226).

The spelling of 312124013 in words is "three hundred twelve million, one hundred twenty-four thousand, thirteen".