145757849 has 2 divisors, whose sum is σ = 145757850. Its totient is φ = 145757848.

The previous prime is 145757827. The next prime is 145757851. The reversal of 145757849 is 948757541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97871449 + 47886400 = 9893^2 + 6920^2 .

It is an emirp because it is prime and its reverse (948757541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145757849 - 2⁸ = 145757593 is a prime.

Together with 145757851, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145757797 and 145757806.

It is not a weakly prime, because it can be changed into another prime (145757809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72878924 + 72878925.

It is an arithmetic number, because the mean of its divisors is an integer number (72878925).

Almost surely, 2^145757849 is an apocalyptic number.

It is an amenable number.

145757849 is a deficient number, since it is larger than the sum of its proper divisors (1).

145757849 is an equidigital number, since it uses as much as digits as its factorization.

145757849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 50.

The square root of 145757849 is about 12073.0215356389. The cubic root of 145757849 is about 526.2724677133.

The spelling of 145757849 in words is "one hundred forty-five million, seven hundred fifty-seven thousand, eight hundred forty-nine".