145450013 has 2 divisors, whose sum is σ = 145450014. Its totient is φ = 145450012.

The previous prime is 145449991. The next prime is 145450021. The reversal of 145450013 is 310054541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 28334329 = 10822^2 + 5323^2 .

It is an emirp because it is prime and its reverse (310054541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145450013 - 2⁸ = 145449757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145450033) 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 as a sum of consecutive naturals, namely, 72725006 + 72725007.

It is an arithmetic number, because the mean of its divisors is an integer number (72725007).

Almost surely, 2^145450013 is an apocalyptic number.

It is an amenable number.

145450013 is a deficient number, since it is larger than the sum of its proper divisors (1).

145450013 is an equidigital number, since it uses as much as digits as its factorization.

145450013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145450013 is about 12060.2658760079. The cubic root of 145450013 is about 525.9017162770.

The spelling of 145450013 in words is "one hundred forty-five million, four hundred fifty thousand, thirteen".