145202789 has 2 divisors, whose sum is σ = 145202790. Its totient is φ = 145202788.

The previous prime is 145202779. The next prime is 145202821. The reversal of 145202789 is 987202541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145202500 + 289 = 12050^2 + 17^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145202789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145202719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72601394 + 72601395.

It is an arithmetic number, because the mean of its divisors is an integer number (72601395).

Almost surely, 2^145202789 is an apocalyptic number.

It is an amenable number.

145202789 is a deficient number, since it is larger than the sum of its proper divisors (1).

145202789 is an equidigital number, since it uses as much as digits as its factorization.

145202789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 145202789 is about 12050.0119916953. The cubic root of 145202789 is about 525.6035857690.

The spelling of 145202789 in words is "one hundred forty-five million, two hundred two thousand, seven hundred eighty-nine".