203893381 has 2 divisors, whose sum is σ = 203893382. Its totient is φ = 203893380.

The previous prime is 203893357. The next prime is 203893399. The reversal of 203893381 is 183398302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191573281 + 12320100 = 13841^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 203893381 - 2⁷ = 203893253 is a prime.

It is a super-2 number, since 2×203893381² = 83145021631222322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203893381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203893331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101946690 + 101946691.

It is an arithmetic number, because the mean of its divisors is an integer number (101946691).

Almost surely, 2^203893381 is an apocalyptic number.

It is an amenable number.

203893381 is a deficient number, since it is larger than the sum of its proper divisors (1).

203893381 is an equidigital number, since it uses as much as digits as its factorization.

203893381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 203893381 is about 14279.1239577223. The cubic root of 203893381 is about 588.5739580924.

The spelling of 203893381 in words is "two hundred three million, eight hundred ninety-three thousand, three hundred eighty-one".