230505131989 has 8 divisors (see below), whose sum is σ = 259571761920. Its totient is φ = 202790438400.

The previous prime is 230505131977. The next prime is 230505132001. The reversal of 230505131989 is 989131505032.

It is an interprime number because it is at equal distance from previous prime (230505131977) and next prime (230505132001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 230505131989 - 2⁷ = 230505131861 is a prime.

It is a super-2 number, since 2×230505131989² (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 (230505131489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337983724 + ... + 337984405.

It is an arithmetic number, because the mean of its divisors is an integer number (32446470240).

Almost surely, 2^230505131989 is an apocalyptic number.

It is an amenable number.

230505131989 is a deficient number, since it is larger than the sum of its proper divisors (29066629931).

230505131989 is a wasteful number, since it uses less digits than its factorization.

230505131989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675968171.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 230505131989 in words is "two hundred thirty billion, five hundred five million, one hundred thirty-one thousand, nine hundred eighty-nine".