145175893 has 4 divisors (see below), whose sum is σ = 145607020. Its totient is φ = 144744768.

The previous prime is 145175879. The next prime is 145175917. The reversal of 145175893 is 398571541.

145175893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398571541 = 9679 ⋅41179.

It can be written as a sum of positive squares in 2 ways, for example, as 102050404 + 43125489 = 10102^2 + 6567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145175893 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 (145175843) 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, 215058 + ... + 215731.

It is an arithmetic number, because the mean of its divisors is an integer number (36401755).

Almost surely, 2^145175893 is an apocalyptic number.

It is an amenable number.

145175893 is a deficient number, since it is larger than the sum of its proper divisors (431127).

145175893 is an equidigital number, since it uses as much as digits as its factorization.

145175893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431126.

The product of its digits is 151200, while the sum is 43.

The square root of 145175893 is about 12048.8959245235. The cubic root of 145175893 is about 525.5711311422.

The spelling of 145175893 in words is "one hundred forty-five million, one hundred seventy-five thousand, eight hundred ninety-three".