971067816 has 24 divisors (see below), whose sum is σ = 2629975530. Its totient is φ = 323689248.

The previous prime is 971067803. The next prime is 971067817. The reversal of 971067816 is 618760179.

It can be written as a sum of positive squares in only one way, i.e., 921365316 + 49702500 = 30354^2 + 7050^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (971067817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6743455 + ... + 6743598.

Almost surely, 2^971067816 is an apocalyptic number.

It is an amenable number.

971067816 is an abundant number, since it is smaller than the sum of its proper divisors (1658907714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971067816 is a wasteful number, since it uses less digits than its factorization.

971067816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13487065 (or 13487058 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 971067816 is about 31161.9610422708. The cubic root of 971067816 is about 990.2614063301.

The spelling of 971067816 in words is "nine hundred seventy-one million, sixty-seven thousand, eight hundred sixteen".