145924789 has 4 divisors (see below), whose sum is σ = 146904300. Its totient is φ = 144945280.

The previous prime is 145924783. The next prime is 145924799. The reversal of 145924789 is 987429541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987429541 = 7 ⋅141061363.

It can be written as a sum of positive squares in 2 ways, for example, as 5904900 + 140019889 = 2430^2 + 11833^2 .

It is a cyclic number.

It is not a de Polignac number, because 145924789 - 2⁷ = 145924661 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145924783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489532 + ... + 489829.

It is an arithmetic number, because the mean of its divisors is an integer number (36726075).

Almost surely, 2^145924789 is an apocalyptic number.

It is an amenable number.

145924789 is a deficient number, since it is larger than the sum of its proper divisors (979511).

145924789 is an equidigital number, since it uses as much as digits as its factorization.

145924789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979510.

The product of its digits is 725760, while the sum is 49.

The square root of 145924789 is about 12079.9333193524. The cubic root of 145924789 is about 526.4733085978.

The spelling of 145924789 in words is "one hundred forty-five million, nine hundred twenty-four thousand, seven hundred eighty-nine".