203091313 has 2 divisors, whose sum is σ = 203091314. Its totient is φ = 203091312.

The previous prime is 203091293. The next prime is 203091331. The reversal of 203091313 is 313190302.

Together with next prime (203091331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169833024 + 33258289 = 13032^2 + 5767^2 .

It is a cyclic number.

It is not a de Polignac number, because 203091313 - 2²¹ = 200994161 is a prime.

It is not a weakly prime, because it can be changed into another prime (203091353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101545656 + 101545657.

It is an arithmetic number, because the mean of its divisors is an integer number (101545657).

Almost surely, 2^203091313 is an apocalyptic number.

It is an amenable number.

203091313 is a deficient number, since it is larger than the sum of its proper divisors (1).

203091313 is an equidigital number, since it uses as much as digits as its factorization.

203091313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 203091313 is about 14251.0109465960. The cubic root of 203091313 is about 587.8011739647.

The spelling of 203091313 in words is "two hundred three million, ninety-one thousand, three hundred thirteen".