203197913 has 4 divisors (see below), whose sum is σ = 213892560. Its totient is φ = 192503268.

The previous prime is 203197871. The next prime is 203197937. The reversal of 203197913 is 319791302.

203197913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319791302 = 2 ⋅159895651.

It is a cyclic number.

It is not a de Polignac number, because 203197913 - 2⁶ = 203197849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203197993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5347295 + ... + 5347332.

It is an arithmetic number, because the mean of its divisors is an integer number (53473140).

Almost surely, 2^203197913 is an apocalyptic number.

It is an amenable number.

203197913 is a deficient number, since it is larger than the sum of its proper divisors (10694647).

203197913 is a wasteful number, since it uses less digits than its factorization.

203197913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10694646.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 203197913 is about 14254.7505414862. The cubic root of 203197913 is about 587.9039990509.

The spelling of 203197913 in words is "two hundred three million, one hundred ninety-seven thousand, nine hundred thirteen".