145018493 has 2 divisors, whose sum is σ = 145018494. Its totient is φ = 145018492.

The previous prime is 145018487. The next prime is 145018529. The reversal of 145018493 is 394810541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 67190809 = 8822^2 + 8197^2 .

It is an emirp because it is prime and its reverse (394810541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145018493 - 2⁴ = 145018477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145048493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72509246 + 72509247.

It is an arithmetic number, because the mean of its divisors is an integer number (72509247).

Almost surely, 2^145018493 is an apocalyptic number.

It is an amenable number.

145018493 is a deficient number, since it is larger than the sum of its proper divisors (1).

145018493 is an equidigital number, since it uses as much as digits as its factorization.

145018493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 145018493 is about 12042.3624343399. The cubic root of 145018493 is about 525.3811206908.

The spelling of 145018493 in words is "one hundred forty-five million, eighteen thousand, four hundred ninety-three".