203400979 has 2 divisors, whose sum is σ = 203400980. Its totient is φ = 203400978.

The previous prime is 203400941. The next prime is 203400991. The reversal of 203400979 is 979004302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203400979 is a prime.

It is not a weakly prime, because it can be changed into another prime (203400919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101700489 + 101700490.

It is an arithmetic number, because the mean of its divisors is an integer number (101700490).

Almost surely, 2^203400979 is an apocalyptic number.

203400979 is a deficient number, since it is larger than the sum of its proper divisors (1).

203400979 is an equidigital number, since it uses as much as digits as its factorization.

203400979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 203400979 is about 14261.8715111306. The cubic root of 203400979 is about 588.0997746294.

The spelling of 203400979 in words is "two hundred three million, four hundred thousand, nine hundred seventy-nine".