145819439 has 4 divisors (see below), whose sum is σ = 146552400. Its totient is φ = 145086480.

The previous prime is 145819423. The next prime is 145819441. The reversal of 145819439 is 934918541.

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 145819439 - 2⁴ = 145819423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145819439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145819459) 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, 366182 + ... + 366579.

It is an arithmetic number, because the mean of its divisors is an integer number (36638100).

Almost surely, 2^145819439 is an apocalyptic number.

145819439 is a deficient number, since it is larger than the sum of its proper divisors (732961).

145819439 is an equidigital number, since it uses as much as digits as its factorization.

145819439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732960.

The product of its digits is 155520, while the sum is 44.

The square root of 145819439 is about 12075.5719947338. The cubic root of 145819439 is about 526.3465827775.

The spelling of 145819439 in words is "one hundred forty-five million, eight hundred nineteen thousand, four hundred thirty-nine".