230145639 has 4 divisors (see below), whose sum is σ = 306860856. Its totient is φ = 153430424.

The previous prime is 230145611. The next prime is 230145649. The reversal of 230145639 is 936541032.

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

It is a cyclic number.

It is not a de Polignac number, because 230145639 - 2⁹ = 230145127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230145649) 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, 38357604 + ... + 38357609.

It is an arithmetic number, because the mean of its divisors is an integer number (76715214).

Almost surely, 2^230145639 is an apocalyptic number.

230145639 is a deficient number, since it is larger than the sum of its proper divisors (76715217).

230145639 is an equidigital number, since it uses as much as digits as its factorization.

230145639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76715216.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 230145639 is about 15170.5517038768. The cubic root of 230145639 is about 612.8218618782.

The spelling of 230145639 in words is "two hundred thirty million, one hundred forty-five thousand, six hundred thirty-nine".