145715773 has 4 divisors (see below), whose sum is σ = 166532320. Its totient is φ = 124899228.

The previous prime is 145715771. The next prime is 145715783. The reversal of 145715773 is 377517541.

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: 377517541 = 677 ⋅557633.

It is a cyclic number.

It is not a de Polignac number, because 145715773 - 2¹ = 145715771 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 (145715771) 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, 10408263 + ... + 10408276.

It is an arithmetic number, because the mean of its divisors is an integer number (41633080).

Almost surely, 2^145715773 is an apocalyptic number.

It is an amenable number.

145715773 is a deficient number, since it is larger than the sum of its proper divisors (20816547).

145715773 is an equidigital number, since it uses as much as digits as its factorization.

145715773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816546.

The product of its digits is 102900, while the sum is 40.

The square root of 145715773 is about 12071.2788469159. The cubic root of 145715773 is about 526.2218230504.

The spelling of 145715773 in words is "one hundred forty-five million, seven hundred fifteen thousand, seven hundred seventy-three".