423997695871 has 2 divisors, whose sum is σ = 423997695872. Its totient is φ = 423997695870.

The previous prime is 423997695859. The next prime is 423997695907. The reversal of 423997695871 is 178596799324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423997695871 - 2¹⁹ = 423997171583 is a prime.

It is a super-2 number, since 2×423997695871² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 423997695871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423997695811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211998847935 + 211998847936.

It is an arithmetic number, because the mean of its divisors is an integer number (211998847936).

Almost surely, 2^423997695871 is an apocalyptic number.

423997695871 is a deficient number, since it is larger than the sum of its proper divisors (1).

423997695871 is an equidigital number, since it uses as much as digits as its factorization.

423997695871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205752960, while the sum is 70.

The spelling of 423997695871 in words is "four hundred twenty-three billion, nine hundred ninety-seven million, six hundred ninety-five thousand, eight hundred seventy-one".