145791913 has 2 divisors, whose sum is σ = 145791914. Its totient is φ = 145791912.

The previous prime is 145791911. The next prime is 145791937. The reversal of 145791913 is 319197541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139901584 + 5890329 = 11828^2 + 2427^2 .

It is a cyclic number.

It is not a de Polignac number, because 145791913 - 2¹ = 145791911 is a prime.

Together with 145791911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145791911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72895956 + 72895957.

It is an arithmetic number, because the mean of its divisors is an integer number (72895957).

Almost surely, 2^145791913 is an apocalyptic number.

It is an amenable number.

145791913 is a deficient number, since it is larger than the sum of its proper divisors (1).

145791913 is an equidigital number, since it uses as much as digits as its factorization.

145791913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 145791913 is about 12074.4322019712. The cubic root of 145791913 is about 526.3134616155.

The spelling of 145791913 in words is "one hundred forty-five million, seven hundred ninety-one thousand, nine hundred thirteen".