403960871 has 2 divisors, whose sum is σ = 403960872. Its totient is φ = 403960870.

The previous prime is 403960861. The next prime is 403960873. The reversal of 403960871 is 178069304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403960871 - 2¹⁴ = 403944487 is a prime.

Together with 403960873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403960873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201980435 + 201980436.

It is an arithmetic number, because the mean of its divisors is an integer number (201980436).

Almost surely, 2^403960871 is an apocalyptic number.

403960871 is a deficient number, since it is larger than the sum of its proper divisors (1).

403960871 is an equidigital number, since it uses as much as digits as its factorization.

403960871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 403960871 is about 20098.7778484166. Note that the first 3 decimals coincide. The cubic root of 403960871 is about 739.2303118358.

The spelling of 403960871 in words is "four hundred three million, nine hundred sixty thousand, eight hundred seventy-one".