428672823893 has 2 divisors, whose sum is σ = 428672823894. Its totient is φ = 428672823892.

The previous prime is 428672823851. The next prime is 428672823937. The reversal of 428672823893 is 398328276824.

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., 232407875569 + 196264948324 = 482087^2 + 443018^2 .

It is a cyclic number.

It is not a de Polignac number, because 428672823893 - 2²⁸ = 428404388437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428672823793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214336411946 + 214336411947.

It is an arithmetic number, because the mean of its divisors is an integer number (214336411947).

Almost surely, 2^428672823893 is an apocalyptic number.

It is an amenable number.

428672823893 is a deficient number, since it is larger than the sum of its proper divisors (1).

428672823893 is an equidigital number, since it uses as much as digits as its factorization.

428672823893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55738368, while the sum is 62.

The spelling of 428672823893 in words is "four hundred twenty-eight billion, six hundred seventy-two million, eight hundred twenty-three thousand, eight hundred ninety-three".