313346381 has 2 divisors, whose sum is σ = 313346382. Its totient is φ = 313346380.

The previous prime is 313346351. The next prime is 313346393. The reversal of 313346381 is 183643313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310993225 + 2353156 = 17635^2 + 1534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313346381 is a prime.

It is a super-2 number, since 2×313346381² = 196371908971594322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313346351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156673190 + 156673191.

It is an arithmetic number, because the mean of its divisors is an integer number (156673191).

Almost surely, 2^313346381 is an apocalyptic number.

It is an amenable number.

313346381 is a deficient number, since it is larger than the sum of its proper divisors (1).

313346381 is an equidigital number, since it uses as much as digits as its factorization.

313346381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 313346381 is about 17701.5926119657. The cubic root of 313346381 is about 679.2165002757.

Adding to 313346381 its reverse (183643313), we get a palindrome (496989694).

The spelling of 313346381 in words is "three hundred thirteen million, three hundred forty-six thousand, three hundred eighty-one".