203400071 has 4 divisors (see below), whose sum is σ = 232457232. Its totient is φ = 174342912.

The previous prime is 203400059. The next prime is 203400091. The reversal of 203400071 is 170004302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203400071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203400091) 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, 14528570 + ... + 14528583.

It is an arithmetic number, because the mean of its divisors is an integer number (58114308).

Almost surely, 2^203400071 is an apocalyptic number.

203400071 is a deficient number, since it is larger than the sum of its proper divisors (29057161).

203400071 is an equidigital number, since it uses as much as digits as its factorization.

203400071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29057160.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 203400071 is about 14261.8396779658. The cubic root of 203400071 is about 588.0988995183.

Adding to 203400071 its reverse (170004302), we get a palindrome (373404373).

The spelling of 203400071 in words is "two hundred three million, four hundred thousand, seventy-one".