145681337 has 2 divisors, whose sum is σ = 145681338. Its totient is φ = 145681336.

The previous prime is 145681271. The next prime is 145681339. The reversal of 145681337 is 733186541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125798656 + 19882681 = 11216^2 + 4459^2 .

It is a cyclic number.

It is not a de Polignac number, because 145681337 - 2¹² = 145677241 is a prime.

Together with 145681339, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145681337.

It is not a weakly prime, because it can be changed into another prime (145681339) 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, 72840668 + 72840669.

It is an arithmetic number, because the mean of its divisors is an integer number (72840669).

Almost surely, 2^145681337 is an apocalyptic number.

It is an amenable number.

145681337 is a deficient number, since it is larger than the sum of its proper divisors (1).

145681337 is an equidigital number, since it uses as much as digits as its factorization.

145681337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 145681337 is about 12069.8524017487. The cubic root of 145681337 is about 526.1803669975.

The spelling of 145681337 in words is "one hundred forty-five million, six hundred eighty-one thousand, three hundred thirty-seven".