145748773 has 4 divisors (see below), whose sum is σ = 146290860. Its totient is φ = 145206688.

The previous prime is 145748767. The next prime is 145748783. The reversal of 145748773 is 377847541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89453764 + 56295009 = 9458^2 + 7503^2 .

It is a cyclic number.

It is not a de Polignac number, because 145748773 - 2⁵ = 145748741 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 (145748783) 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, 270640 + ... + 271177.

It is an arithmetic number, because the mean of its divisors is an integer number (36572715).

Almost surely, 2^145748773 is an apocalyptic number.

It is an amenable number.

145748773 is a deficient number, since it is larger than the sum of its proper divisors (542087).

145748773 is an equidigital number, since it uses as much as digits as its factorization.

145748773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542086.

The product of its digits is 658560, while the sum is 46.

The square root of 145748773 is about 12072.6456503949. The cubic root of 145748773 is about 526.2615442351.

The spelling of 145748773 in words is "one hundred forty-five million, seven hundred forty-eight thousand, seven hundred seventy-three".