401003947 has 2 divisors, whose sum is σ = 401003948. Its totient is φ = 401003946.

The previous prime is 401003923. The next prime is 401003963. The reversal of 401003947 is 749300104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401003947 - 2²³ = 392615339 is a prime.

It is not a weakly prime, because it can be changed into another prime (401003047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200501973 + 200501974.

It is an arithmetic number, because the mean of its divisors is an integer number (200501974).

Almost surely, 2^401003947 is an apocalyptic number.

401003947 is a deficient number, since it is larger than the sum of its proper divisors (1).

401003947 is an equidigital number, since it uses as much as digits as its factorization.

401003947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 401003947 is about 20025.0829461453. The cubic root of 401003947 is about 737.4222134563.

The spelling of 401003947 in words is "four hundred one million, three thousand, nine hundred forty-seven".