203013091 has 2 divisors, whose sum is σ = 203013092. Its totient is φ = 203013090.

The previous prime is 203013071. The next prime is 203013127. The reversal of 203013091 is 190310302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203013091 - 2²⁵ = 169458659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (203013001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101506545 + 101506546.

It is an arithmetic number, because the mean of its divisors is an integer number (101506546).

Almost surely, 2^203013091 is an apocalyptic number.

203013091 is a deficient number, since it is larger than the sum of its proper divisors (1).

203013091 is an equidigital number, since it uses as much as digits as its factorization.

203013091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 203013091 is about 14248.2662454068. The cubic root of 203013091 is about 587.7256990678.

Adding to 203013091 its reverse (190310302), we get a palindrome (393323393).

The spelling of 203013091 in words is "two hundred three million, thirteen thousand, ninety-one".