203494789 has 4 divisors (see below), whose sum is σ = 203528556. Its totient is φ = 203461024.

The previous prime is 203494787. The next prime is 203494793. The reversal of 203494789 is 987494302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987494302 = 2 ⋅493747151.

It can be written as a sum of positive squares in 2 ways, for example, as 50552100 + 152942689 = 7110^2 + 12367^2 .

It is a cyclic number.

It is not a de Polignac number, because 203494789 - 2¹ = 203494787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203494787) 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, 5104 + ... + 20809.

It is an arithmetic number, because the mean of its divisors is an integer number (50882139).

Almost surely, 2^203494789 is an apocalyptic number.

It is an amenable number.

203494789 is a deficient number, since it is larger than the sum of its proper divisors (33767).

203494789 is an equidigital number, since it uses as much as digits as its factorization.

203494789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33766.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 203494789 is about 14265.1599710624. The cubic root of 203494789 is about 588.1901726874.

The spelling of 203494789 in words is "two hundred three million, four hundred ninety-four thousand, seven hundred eighty-nine".