145775717 has 4 divisors (see below), whose sum is σ = 148877376. Its totient is φ = 142674060.

The previous prime is 145775713. The next prime is 145775723. The reversal of 145775717 is 717577541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145775717 - 2² = 145775713 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 (145775711) 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, 1550759 + ... + 1550852.

It is an arithmetic number, because the mean of its divisors is an integer number (37219344).

Almost surely, 2^145775717 is an apocalyptic number.

It is an amenable number.

145775717 is a deficient number, since it is larger than the sum of its proper divisors (3101659).

145775717 is an equidigital number, since it uses as much as digits as its factorization.

145775717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101658.

The product of its digits is 240100, while the sum is 44.

The square root of 145775717 is about 12073.7615099852. The cubic root of 145775717 is about 526.2939715347.

The spelling of 145775717 in words is "one hundred forty-five million, seven hundred seventy-five thousand, seven hundred seventeen".