145743789 has 4 divisors (see below), whose sum is σ = 194325056. Its totient is φ = 97162524.

The previous prime is 145743779. The next prime is 145743797. The reversal of 145743789 is 987347541.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 987347541 = 3 ⋅329115847.

It is not a de Polignac number, because 145743789 - 2⁹ = 145743277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145743779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24290629 + ... + 24290634.

It is an arithmetic number, because the mean of its divisors is an integer number (48581264).

Almost surely, 2^145743789 is an apocalyptic number.

It is an amenable number.

145743789 is a deficient number, since it is larger than the sum of its proper divisors (48581267).

145743789 is an equidigital number, since it uses as much as digits as its factorization.

145743789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48581266.

The product of its digits is 846720, while the sum is 48.

The square root of 145743789 is about 12072.4392315721. The cubic root of 145743789 is about 526.2555455170.

The spelling of 145743789 in words is "one hundred forty-five million, seven hundred forty-three thousand, seven hundred eighty-nine".