203412278791 has 2 divisors, whose sum is σ = 203412278792. Its totient is φ = 203412278790.

The previous prime is 203412278789. The next prime is 203412278843. The reversal of 203412278791 is 197872214302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203412278791 - 2¹ = 203412278789 is a prime.

Together with 203412278789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203412288791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101706139395 + 101706139396.

It is an arithmetic number, because the mean of its divisors is an integer number (101706139396).

Almost surely, 2^203412278791 is an apocalyptic number.

203412278791 is a deficient number, since it is larger than the sum of its proper divisors (1).

203412278791 is an equidigital number, since it uses as much as digits as its factorization.

203412278791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 203412278791 in words is "two hundred three billion, four hundred twelve million, two hundred seventy-eight thousand, seven hundred ninety-one".