399347141 has 2 divisors, whose sum is σ = 399347142. Its totient is φ = 399347140.

The previous prime is 399347131. The next prime is 399347147. The reversal of 399347141 is 141743993.

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., 204633025 + 194714116 = 14305^2 + 13954^2 .

It is an emirp because it is prime and its reverse (141743993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399347141 - 2²² = 395152837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399347147) 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, 199673570 + 199673571.

It is an arithmetic number, because the mean of its divisors is an integer number (199673571).

Almost surely, 2^399347141 is an apocalyptic number.

It is an amenable number.

399347141 is a deficient number, since it is larger than the sum of its proper divisors (1).

399347141 is an equidigital number, since it uses as much as digits as its factorization.

399347141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 399347141 is about 19983.6718597959. The cubic root of 399347141 is about 736.4052225898.

The spelling of 399347141 in words is "three hundred ninety-nine million, three hundred forty-seven thousand, one hundred forty-one".