313603421 has 2 divisors, whose sum is σ = 313603422. Its totient is φ = 313603420.

The previous prime is 313603399. The next prime is 313603427. The reversal of 313603421 is 124306313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248220025 + 65383396 = 15755^2 + 8086^2 .

It is a cyclic number.

It is not a de Polignac number, because 313603421 - 2⁶ = 313603357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313603427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156801710 + 156801711.

It is an arithmetic number, because the mean of its divisors is an integer number (156801711).

Almost surely, 2^313603421 is an apocalyptic number.

It is an amenable number.

313603421 is a deficient number, since it is larger than the sum of its proper divisors (1).

313603421 is an equidigital number, since it uses as much as digits as its factorization.

313603421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 313603421 is about 17708.8514873212. The cubic root of 313603421 is about 679.4021713665.

Adding to 313603421 its reverse (124306313), we get a palindrome (437909734).

The spelling of 313603421 in words is "three hundred thirteen million, six hundred three thousand, four hundred twenty-one".