399442941127 has 2 divisors, whose sum is σ = 399442941128. Its totient is φ = 399442941126.

The previous prime is 399442941113. The next prime is 399442941197. The reversal of 399442941127 is 721149244993.

It is a weak prime.

It is an emirp because it is prime and its reverse (721149244993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399442941127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399442941197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199721470563 + 199721470564.

It is an arithmetic number, because the mean of its divisors is an integer number (199721470564).

Almost surely, 2^399442941127 is an apocalyptic number.

399442941127 is a deficient number, since it is larger than the sum of its proper divisors (1).

399442941127 is an equidigital number, since it uses as much as digits as its factorization.

399442941127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The spelling of 399442941127 in words is "three hundred ninety-nine billion, four hundred forty-two million, nine hundred forty-one thousand, one hundred twenty-seven".