203434378683 has 4 divisors (see below), whose sum is σ = 271245838248. Its totient is φ = 135622919120.

The previous prime is 203434378681. The next prime is 203434378717. The reversal of 203434378683 is 386873434302.

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

It is a cyclic number.

It is not a de Polignac number, because 203434378683 - 2¹ = 203434378681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203434378681) 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, 33905729778 + ... + 33905729783.

It is an arithmetic number, because the mean of its divisors is an integer number (67811459562).

Almost surely, 2^203434378683 is an apocalyptic number.

203434378683 is a deficient number, since it is larger than the sum of its proper divisors (67811459565).

203434378683 is an equidigital number, since it uses as much as digits as its factorization.

203434378683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67811459564.

The product of its (nonzero) digits is 6967296, while the sum is 51.

The spelling of 203434378683 in words is "two hundred three billion, four hundred thirty-four million, three hundred seventy-eight thousand, six hundred eighty-three".