145172393 has 2 divisors, whose sum is σ = 145172394. Its totient is φ = 145172392.

The previous prime is 145172387. The next prime is 145172453. The reversal of 145172393 is 393271541.

145172393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144889369 + 283024 = 12037^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 145172393 - 2²⁶ = 78063529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145172323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72586196 + 72586197.

It is an arithmetic number, because the mean of its divisors is an integer number (72586197).

Almost surely, 2^145172393 is an apocalyptic number.

It is an amenable number.

145172393 is a deficient number, since it is larger than the sum of its proper divisors (1).

145172393 is an equidigital number, since it uses as much as digits as its factorization.

145172393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 145172393 is about 12048.7506821247. The cubic root of 145172393 is about 525.5669074985.

The spelling of 145172393 in words is "one hundred forty-five million, one hundred seventy-two thousand, three hundred ninety-three".