971865890247 has 16 divisors (see below), whose sum is σ = 1480975146752. Its totient is φ = 555338194560.

The previous prime is 971865890189. The next prime is 971865890291. The reversal of 971865890247 is 742098568179.

It is not a de Polignac number, because 971865890247 - 2⁷ = 971865890119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971865810247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329247 + ... + 1432527.

It is an arithmetic number, because the mean of its divisors is an integer number (92560946672).

Almost surely, 2^971865890247 is an apocalyptic number.

971865890247 is a deficient number, since it is larger than the sum of its proper divisors (509109256505).

971865890247 is a wasteful number, since it uses less digits than its factorization.

971865890247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145238.

The product of its (nonzero) digits is 60963840, while the sum is 66.

The spelling of 971865890247 in words is "nine hundred seventy-one billion, eight hundred sixty-five million, eight hundred ninety thousand, two hundred forty-seven".