971004504209 has 2 divisors, whose sum is σ = 971004504210. Its totient is φ = 971004504208.

The previous prime is 971004504191. The next prime is 971004504269. The reversal of 971004504209 is 902405400179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722729518225 + 248274985984 = 850135^2 + 498272^2 .

It is an emirp because it is prime and its reverse (902405400179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971004504209 - 2²⁴ = 970987726993 is a prime.

It is not a weakly prime, because it can be changed into another prime (971004504269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485502252104 + 485502252105.

It is an arithmetic number, because the mean of its divisors is an integer number (485502252105).

Almost surely, 2^971004504209 is an apocalyptic number.

It is an amenable number.

971004504209 is a deficient number, since it is larger than the sum of its proper divisors (1).

971004504209 is an equidigital number, since it uses as much as digits as its factorization.

971004504209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 971004504209 in words is "nine hundred seventy-one billion, four million, five hundred four thousand, two hundred nine".