423847888369 has 4 divisors (see below), whose sum is σ = 423864120996. Its totient is φ = 423831655744.

The previous prime is 423847888367. The next prime is 423847888423. The reversal of 423847888369 is 963888748324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33897596769 + 389950291600 = 184113^2 + 624460^2 .

It is a cyclic number.

It is not a de Polignac number, because 423847888369 - 2¹ = 423847888367 is a prime.

It is a super-2 number, since 2×423847888369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423847888298 and 423847888307.

It is not an unprimeable number, because it can be changed into a prime (423847888363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8077084 + ... + 8129389.

It is an arithmetic number, because the mean of its divisors is an integer number (105966030249).

Almost surely, 2^423847888369 is an apocalyptic number.

It is an amenable number.

423847888369 is a deficient number, since it is larger than the sum of its proper divisors (16232627).

423847888369 is a wasteful number, since it uses less digits than its factorization.

423847888369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16232626.

The product of its digits is 445906944, while the sum is 70.

The spelling of 423847888369 in words is "four hundred twenty-three billion, eight hundred forty-seven million, eight hundred eighty-eight thousand, three hundred sixty-nine".