145573789 has 2 divisors, whose sum is σ = 145573790. Its totient is φ = 145573788.

The previous prime is 145573723. The next prime is 145573807. The reversal of 145573789 is 987375541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141205689 + 4368100 = 11883^2 + 2090^2 .

It is an emirp because it is prime and its reverse (987375541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145573789 - 2²¹ = 143476637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145573289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72786894 + 72786895.

It is an arithmetic number, because the mean of its divisors is an integer number (72786895).

Almost surely, 2^145573789 is an apocalyptic number.

It is an amenable number.

145573789 is a deficient number, since it is larger than the sum of its proper divisors (1).

145573789 is an equidigital number, since it uses as much as digits as its factorization.

145573789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The square root of 145573789 is about 12065.3963465773. The cubic root of 145573789 is about 526.0508524040.

The spelling of 145573789 in words is "one hundred forty-five million, five hundred seventy-three thousand, seven hundred eighty-nine".