313403861 has 2 divisors, whose sum is σ = 313403862. Its totient is φ = 313403860.

The previous prime is 313403851. The next prime is 313403939. The reversal of 313403861 is 168304313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194463025 + 118940836 = 13945^2 + 10906^2 .

It is a cyclic number.

It is not a de Polignac number, because 313403861 - 2²² = 309209557 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 (313403821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156701930 + 156701931.

It is an arithmetic number, because the mean of its divisors is an integer number (156701931).

Almost surely, 2^313403861 is an apocalyptic number.

It is an amenable number.

313403861 is a deficient number, since it is larger than the sum of its proper divisors (1).

313403861 is an equidigital number, since it uses as much as digits as its factorization.

313403861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 313403861 is about 17703.2161202421. The cubic root of 313403861 is about 679.2580293734.

The spelling of 313403861 in words is "three hundred thirteen million, four hundred three thousand, eight hundred sixty-one".