145339493 has 12 divisors (see below), whose sum is σ = 165666240. Its totient is φ = 127095696.

The previous prime is 145339471. The next prime is 145339529. The reversal of 145339493 is 394933541.

It is not a de Polignac number, because 145339493 - 2⁶ = 145339429 is a prime.

It is a super-2 number, since 2×145339493² = 42247136450994098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145339493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145339433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19421 + ... + 25842.

It is an arithmetic number, because the mean of its divisors is an integer number (13805520).

Almost surely, 2^145339493 is an apocalyptic number.

145339493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145339493 is a deficient number, since it is larger than the sum of its proper divisors (20326747).

145339493 is a wasteful number, since it uses less digits than its factorization.

145339493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45308 (or 45295 counting only the distinct ones).

The product of its digits is 174960, while the sum is 41.

The square root of 145339493 is about 12055.6830167353. The cubic root of 145339493 is about 525.7684806171.

The spelling of 145339493 in words is "one hundred forty-five million, three hundred thirty-nine thousand, four hundred ninety-three".