971442712729 has 4 divisors (see below), whose sum is σ = 971456615460. Its totient is φ = 971428810000.

The previous prime is 971442712661. The next prime is 971442712739. The reversal of 971442712729 is 927217244179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927217244179 = 2803 ⋅330794593.

It can be written as a sum of positive squares in 2 ways, for example, as 494827833600 + 476614879129 = 703440^2 + 690373^2 .

It is a cyclic number.

It is not a de Polignac number, because 971442712729 - 2²¹ = 971440615577 is a prime.

It is a super-2 number, since 2×971442712729² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971442712729.

It is not an unprimeable number, because it can be changed into a prime (971442712739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6846022 + ... + 6986479.

It is an arithmetic number, because the mean of its divisors is an integer number (242864153865).

Almost surely, 2^971442712729 is an apocalyptic number.

It is an amenable number.

971442712729 is a deficient number, since it is larger than the sum of its proper divisors (13902731).

971442712729 is a wasteful number, since it uses less digits than its factorization.

971442712729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902730.

The product of its digits is 3556224, while the sum is 55.

The spelling of 971442712729 in words is "nine hundred seventy-one billion, four hundred forty-two million, seven hundred twelve thousand, seven hundred twenty-nine".