145328689 has 4 divisors (see below), whose sum is σ = 158540400. Its totient is φ = 132116980.

The previous prime is 145328683. The next prime is 145328731. The reversal of 145328689 is 986823541.

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 145328689 - 2⁹ = 145328177 is a prime.

It is a super-2 number, since 2×145328689² = 42240855692917442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145328683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6605839 + ... + 6605860.

It is an arithmetic number, because the mean of its divisors is an integer number (39635100).

Almost surely, 2^145328689 is an apocalyptic number.

It is an amenable number.

145328689 is a deficient number, since it is larger than the sum of its proper divisors (13211711).

145328689 is a wasteful number, since it uses less digits than its factorization.

145328689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13211710.

The product of its digits is 414720, while the sum is 46.

The square root of 145328689 is about 12055.2349209794. The cubic root of 145328689 is about 525.7554524000.

The spelling of 145328689 in words is "one hundred forty-five million, three hundred twenty-eight thousand, six hundred eighty-nine".