145191799 has 2 divisors, whose sum is σ = 145191800. Its totient is φ = 145191798.

The previous prime is 145191791. The next prime is 145191803. The reversal of 145191799 is 997191541.

It is a strong prime.

It is an emirp because it is prime and its reverse (997191541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145191799 - 2³ = 145191791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145191791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72595899 + 72595900.

It is an arithmetic number, because the mean of its divisors is an integer number (72595900).

Almost surely, 2^145191799 is an apocalyptic number.

145191799 is a deficient number, since it is larger than the sum of its proper divisors (1).

145191799 is an equidigital number, since it uses as much as digits as its factorization.

145191799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 46.

The square root of 145191799 is about 12049.5559669226. Note that the first 3 decimals coincide. The cubic root of 145191799 is about 525.5903249375.

The spelling of 145191799 in words is "one hundred forty-five million, one hundred ninety-one thousand, seven hundred ninety-nine".