86440089973 has 2 divisors, whose sum is σ = 86440089974. Its totient is φ = 86440089972.

The previous prime is 86440089971. The next prime is 86440089991. The reversal of 86440089973 is 37998004468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67770146929 + 18669943044 = 260327^2 + 136638^2 .

It is a cyclic number.

It is not a de Polignac number, because 86440089973 - 2¹ = 86440089971 is a prime.

Together with 86440089971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86440089971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43220044986 + 43220044987.

It is an arithmetic number, because the mean of its divisors is an integer number (43220044987).

Almost surely, 2^86440089973 is an apocalyptic number.

It is an amenable number.

86440089973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86440089973 is an equidigital number, since it uses as much as digits as its factorization.

86440089973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 86440089973 in words is "eighty-six billion, four hundred forty million, eighty-nine thousand, nine hundred seventy-three".