313630421 has 4 divisors (see below), whose sum is σ = 337755852. Its totient is φ = 289504992.

The previous prime is 313630381. The next prime is 313630451. The reversal of 313630421 is 124036313.

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 124567921 + 189062500 = 11161^2 + 13750^2 .

It is a cyclic number.

It is not a de Polignac number, because 313630421 - 2¹⁰ = 313629397 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 (313630451) 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, 12062696 + ... + 12062721.

It is an arithmetic number, because the mean of its divisors is an integer number (84438963).

Almost surely, 2^313630421 is an apocalyptic number.

It is an amenable number.

313630421 is a deficient number, since it is larger than the sum of its proper divisors (24125431).

313630421 is a wasteful number, since it uses less digits than its factorization.

313630421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24125430.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 313630421 is about 17709.6138015486. The cubic root of 313630421 is about 679.4216687433.

Adding to 313630421 its reverse (124036313), we get a palindrome (437666734).

The spelling of 313630421 in words is "three hundred thirteen million, six hundred thirty thousand, four hundred twenty-one".