403966243 has 2 divisors, whose sum is σ = 403966244. Its totient is φ = 403966242.

The previous prime is 403966193. The next prime is 403966261. The reversal of 403966243 is 342669304.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403966243 is a prime.

It is not a weakly prime, because it can be changed into another prime (403960243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201983121 + 201983122.

It is an arithmetic number, because the mean of its divisors is an integer number (201983122).

Almost surely, 2^403966243 is an apocalyptic number.

403966243 is a deficient number, since it is larger than the sum of its proper divisors (1).

403966243 is an equidigital number, since it uses as much as digits as its factorization.

403966243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 403966243 is about 20098.9114879388. The cubic root of 403966243 is about 739.2335886611.

The spelling of 403966243 in words is "four hundred three million, nine hundred sixty-six thousand, two hundred forty-three".