428019918701 has 2 divisors, whose sum is σ = 428019918702. Its totient is φ = 428019918700.

The previous prime is 428019918691. The next prime is 428019918713. The reversal of 428019918701 is 107819910824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423709864900 + 4310053801 = 650930^2 + 65651^2 .

It is a cyclic number.

It is not a de Polignac number, because 428019918701 - 2²² = 428015724397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 428019918701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428019918721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214009959350 + 214009959351.

It is an arithmetic number, because the mean of its divisors is an integer number (214009959351).

Almost surely, 2^428019918701 is an apocalyptic number.

It is an amenable number.

428019918701 is a deficient number, since it is larger than the sum of its proper divisors (1).

428019918701 is an equidigital number, since it uses as much as digits as its factorization.

428019918701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 428019918701 in words is "four hundred twenty-eight billion, nineteen million, nine hundred eighteen thousand, seven hundred one".