203406345 has 48 divisors (see below), whose sum is σ = 366912000. Its totient is φ = 104129280.

The previous prime is 203406337. The next prime is 203406347. The reversal of 203406345 is 543604302.

203406345 is a `hidden beast` number, since 20 + 3 + 4 + 0 + 634 + 5 = 666.

203406345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203406345 - 2³ = 203406337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203406347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193381 + ... + 194429.

It is an arithmetic number, because the mean of its divisors is an integer number (7644000).

Almost surely, 2^203406345 is an apocalyptic number.

It is an amenable number.

203406345 is a deficient number, since it is larger than the sum of its proper divisors (163505655).

203406345 is a wasteful number, since it uses less digits than its factorization.

203406345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 203406345 is about 14262.0596338678. The cubic root of 203406345 is about 588.1049462133.

The spelling of 203406345 in words is "two hundred three million, four hundred six thousand, three hundred forty-five".