203144947 has 4 divisors (see below), whose sum is σ = 211977360. Its totient is φ = 194312536.

The previous prime is 203144927. The next prime is 203144989. The reversal of 203144947 is 749441302.

It is a happy number.

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 203144947 - 2⁷ = 203144819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203144927) 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, 4416172 + ... + 4416217.

It is an arithmetic number, because the mean of its divisors is an integer number (52994340).

Almost surely, 2^203144947 is an apocalyptic number.

203144947 is a deficient number, since it is larger than the sum of its proper divisors (8832413).

203144947 is an equidigital number, since it uses as much as digits as its factorization.

203144947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832412.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 203144947 is about 14252.8925836126. The cubic root of 203144947 is about 587.8529131765.

The spelling of 203144947 in words is "two hundred three million, one hundred forty-four thousand, nine hundred forty-seven".