969976817 has 4 divisors (see below), whose sum is σ = 979976676. Its totient is φ = 959976960.

The previous prime is 969976801. The next prime is 969976897. The reversal of 969976817 is 718679969.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 781985296 + 187991521 = 27964^2 + 13711^2 .

It is a cyclic number.

It is not a de Polignac number, because 969976817 - 2⁴ = 969976801 is a prime.

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 969976817.

It is not an unprimeable number, because it can be changed into a prime (969976897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999784 + ... + 4999977.

It is an arithmetic number, because the mean of its divisors is an integer number (244994169).

Almost surely, 2^969976817 is an apocalyptic number.

969976817 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

969976817 is a deficient number, since it is larger than the sum of its proper divisors (9999859).

969976817 is an equidigital number, since it uses as much as digits as its factorization.

969976817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999858.

The product of its digits is 10287648, while the sum is 62.

The square root of 969976817 is about 31144.4508219362. The cubic root of 969976817 is about 989.8904129965.

The spelling of 969976817 in words is "nine hundred sixty-nine million, nine hundred seventy-six thousand, eight hundred seventeen".