399990011041001 has 2 divisors, whose sum is σ = 399990011041002. Its totient is φ = 399990011041000.

The previous prime is 399990011040979. The next prime is 399990011041081. The reversal of 399990011041001 is 100140110099993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290364190085776 + 109625820955225 = 17040076^2 + 10470235^2 .

It is an emirp because it is prime and its reverse (100140110099993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399990011041001 - 2¹⁰ = 399990011039977 is a prime.

It is not a weakly prime, because it can be changed into another prime (399990011041081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199995005520500 + 199995005520501.

It is an arithmetic number, because the mean of its divisors is an integer number (199995005520501).

Almost surely, 2^{399990011041001} is an apocalyptic number.

It is an amenable number.

399990011041001 is a deficient number, since it is larger than the sum of its proper divisors (1).

399990011041001 is an equidigital number, since it uses as much as digits as its factorization.

399990011041001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 47.

The spelling of 399990011041001 in words is "three hundred ninety-nine trillion, nine hundred ninety billion, eleven million, forty-one thousand, one".