403421021873 has 2 divisors, whose sum is σ = 403421021874. Its totient is φ = 403421021872.

The previous prime is 403421021777. The next prime is 403421021929. The reversal of 403421021873 is 378120124304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388918118689 + 14502903184 = 623633^2 + 120428^2 .

It is a cyclic number.

It is not a de Polignac number, because 403421021873 - 2¹² = 403421017777 is a prime.

It is not a weakly prime, because it can be changed into another prime (403421071873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201710510936 + 201710510937.

It is an arithmetic number, because the mean of its divisors is an integer number (201710510937).

Almost surely, 2^403421021873 is an apocalyptic number.

It is an amenable number.

403421021873 is a deficient number, since it is larger than the sum of its proper divisors (1).

403421021873 is an equidigital number, since it uses as much as digits as its factorization.

403421021873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 403421021873 in words is "four hundred three billion, four hundred twenty-one million, twenty-one thousand, eight hundred seventy-three".