423425906989 has 4 divisors (see below), whose sum is σ = 441835729056. Its totient is φ = 405016084924.

The previous prime is 423425906963. The next prime is 423425907001. The reversal of 423425906989 is 989609524324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423425906989 - 2⁵ = 423425906957 is a prime.

It is a super-2 number, since 2×423425906989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423425906489) 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, 9204910999 + ... + 9204911044.

It is an arithmetic number, because the mean of its divisors is an integer number (110458932264).

Almost surely, 2^423425906989 is an apocalyptic number.

It is an amenable number.

423425906989 is a deficient number, since it is larger than the sum of its proper divisors (18409822067).

423425906989 is a wasteful number, since it uses less digits than its factorization.

423425906989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18409822066.

The product of its (nonzero) digits is 33592320, while the sum is 61.

The spelling of 423425906989 in words is "four hundred twenty-three billion, four hundred twenty-five million, nine hundred six thousand, nine hundred eighty-nine".