203145397 has 32 divisors (see below), whose sum is σ = 264741120. Its totient is φ = 151372800.

The previous prime is 203145391. The next prime is 203145409. The reversal of 203145397 is 793541302.

It is a cyclic number.

It is not a de Polignac number, because 203145397 - 2³ = 203145389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203145391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506397 + ... + 506797.

It is an arithmetic number, because the mean of its divisors is an integer number (8273160).

Almost surely, 2^203145397 is an apocalyptic number.

It is an amenable number.

203145397 is a deficient number, since it is larger than the sum of its proper divisors (61595723).

203145397 is a wasteful number, since it uses less digits than its factorization.

203145397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 203145397 is about 14252.9083698731. The cubic root of 203145397 is about 587.8533472403.

Adding to 203145397 its reverse (793541302), we get a palindrome (996686699).

The spelling of 203145397 in words is "two hundred three million, one hundred forty-five thousand, three hundred ninety-seven".