145175389 has 2 divisors, whose sum is σ = 145175390. Its totient is φ = 145175388.

The previous prime is 145175323. The next prime is 145175411. The reversal of 145175389 is 983571541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138062500 + 7112889 = 11750^2 + 2667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145175389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145175489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72587694 + 72587695.

It is an arithmetic number, because the mean of its divisors is an integer number (72587695).

Almost surely, 2^145175389 is an apocalyptic number.

It is an amenable number.

145175389 is a deficient number, since it is larger than the sum of its proper divisors (1).

145175389 is an equidigital number, since it uses as much as digits as its factorization.

145175389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 145175389 is about 12048.8750097260. The cubic root of 145175389 is about 525.5705229417.

The spelling of 145175389 in words is "one hundred forty-five million, one hundred seventy-five thousand, three hundred eighty-nine".