145000813 has 2 divisors, whose sum is σ = 145000814. Its totient is φ = 145000812.

The previous prime is 145000771. The next prime is 145000831. The reversal of 145000813 is 318000541.

Together with next prime (145000831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78464164 + 66536649 = 8858^2 + 8157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145000813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145000873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72500406 + 72500407.

It is an arithmetic number, because the mean of its divisors is an integer number (72500407).

Almost surely, 2^145000813 is an apocalyptic number.

It is an amenable number.

145000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

145000813 is an equidigital number, since it uses as much as digits as its factorization.

145000813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 145000813 is about 12041.6283367325. The cubic root of 145000813 is about 525.3597691249.

The spelling of 145000813 in words is "one hundred forty-five million, eight hundred thirteen", and thus it is an aban number.