145809593 has 4 divisors (see below), whose sum is σ = 150837540. Its totient is φ = 140781648.

The previous prime is 145809583. The next prime is 145809611. The reversal of 145809593 is 395908541.

It is a happy number.

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 99460729 + 46348864 = 9973^2 + 6808^2 .

It is a cyclic number.

It is not a de Polignac number, because 145809593 - 2⁶ = 145809529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145809583) 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, 2513930 + ... + 2513987.

It is an arithmetic number, because the mean of its divisors is an integer number (37709385).

Almost surely, 2^145809593 is an apocalyptic number.

It is an amenable number.

145809593 is a deficient number, since it is larger than the sum of its proper divisors (5027947).

145809593 is an equidigital number, since it uses as much as digits as its factorization.

145809593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027946.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 145809593 is about 12075.1643053004. The cubic root of 145809593 is about 526.3347358771.

The spelling of 145809593 in words is "one hundred forty-five million, eight hundred nine thousand, five hundred ninety-three".