399000020010281 has 2 divisors, whose sum is σ = 399000020010282. Its totient is φ = 399000020010280.

The previous prime is 399000020010247. The next prime is 399000020010323. The reversal of 399000020010281 is 182010020000993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287450323009600 + 111549697000681 = 16954360^2 + 10561709^2 .

It is a cyclic number.

It is not a de Polignac number, because 399000020010281 - 2¹⁸ = 399000019748137 is a prime.

It is a super-2 number, since 2×399000020010281² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (399000020015281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199500010005140 + 199500010005141.

It is an arithmetic number, because the mean of its divisors is an integer number (199500010005141).

Almost surely, 2^{399000020010281} is an apocalyptic number.

It is an amenable number.

399000020010281 is a deficient number, since it is larger than the sum of its proper divisors (1).

399000020010281 is an equidigital number, since it uses as much as digits as its factorization.

399000020010281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 399000020010281 in words is "three hundred ninety-nine trillion, twenty million, ten thousand, two hundred eighty-one".