145493317 has 4 divisors (see below), whose sum is σ = 153150880. Its totient is φ = 137835756.

The previous prime is 145493291. The next prime is 145493353. The reversal of 145493317 is 713394541.

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 145493317 - 2⁷ = 145493189 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 (145493417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3828753 + ... + 3828790.

It is an arithmetic number, because the mean of its divisors is an integer number (38287720).

Almost surely, 2^145493317 is an apocalyptic number.

It is an amenable number.

145493317 is a deficient number, since it is larger than the sum of its proper divisors (7657563).

145493317 is an equidigital number, since it uses as much as digits as its factorization.

145493317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7657562.

The product of its digits is 45360, while the sum is 37.

The square root of 145493317 is about 12062.0610593712. The cubic root of 145493317 is about 525.9539023344.

The spelling of 145493317 in words is "one hundred forty-five million, four hundred ninety-three thousand, three hundred seventeen".