203409434 has 8 divisors (see below), whose sum is σ = 305221620. Its totient is φ = 101668896.

The previous prime is 203409433. The next prime is 203409439. The reversal of 203409434 is 434904302.

It can be written as a sum of positive squares in 2 ways, for example, as 198105625 + 5303809 = 14075^2 + 2303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 203409397 and 203409406.

It is not an unprimeable number, because it can be changed into a prime (203409431) 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 3 ways as a sum of consecutive naturals, for example, 10139 + ... + 22574.

Almost surely, 2^203409434 is an apocalyptic number.

203409434 is a deficient number, since it is larger than the sum of its proper divisors (101812186).

203409434 is a wasteful number, since it uses less digits than its factorization.

203409434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35824.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 203409434 is about 14262.1679277731. The cubic root of 203409434 is about 588.1079232541.

The spelling of 203409434 in words is "two hundred three million, four hundred nine thousand, four hundred thirty-four".