899999939999971 has 2 divisors, whose sum is σ = 899999939999972. Its totient is φ = 899999939999970.

The previous prime is 899999939999921. The next prime is 899999940000059. The reversal of 899999939999971 is 179999939999998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899999939999971 - 2⁷ = 899999939999843 is a prime.

It is not a weakly prime, because it can be changed into another prime (899999939999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449999969999985 + 449999969999986.

It is an arithmetic number, because the mean of its divisors is an integer number (449999969999986).

Almost surely, 2^{899999939999971} is an apocalyptic number.

899999939999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

899999939999971 is an equidigital number, since it uses as much as digits as its factorization.

899999939999971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5272018014312, while the sum is 118.

The spelling of 899999939999971 in words is "eight hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".