313418821 has 4 divisors (see below), whose sum is σ = 314526592. Its totient is φ = 312311052.

The previous prime is 313418761. The next prime is 313418867. The reversal of 313418821 is 128814313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 128814313 = 1153 ⋅111721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313418821 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 (313418221) 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, 553461 + ... + 554026.

It is an arithmetic number, because the mean of its divisors is an integer number (78631648).

Almost surely, 2^313418821 is an apocalyptic number.

It is an amenable number.

313418821 is a deficient number, since it is larger than the sum of its proper divisors (1107771).

313418821 is a wasteful number, since it uses less digits than its factorization.

313418821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107770.

The product of its digits is 4608, while the sum is 31.

The square root of 313418821 is about 17703.6386372971. The cubic root of 313418821 is about 679.2688370880.

The spelling of 313418821 in words is "three hundred thirteen million, four hundred eighteen thousand, eight hundred twenty-one".