926978063209 has 45 divisors (see below), whose sum is σ = 1043400642165. Its totient is φ = 823538041920.

The previous prime is 926978063191. The next prime is 926978063213. The reversal of 926978063209 is 902360879629.

The square root of 926978063209 is 962797.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 66113265625 + 860864797584 = 257125^2 + 927828^2 .

It is a de Polignac number, because none of the positive numbers 2^k-926978063209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (926978060209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 8504385847 + ... + 8504385955.

It is an arithmetic number, because the mean of its divisors is an integer number (23186680937).

Almost surely, 2^926978063209 is an apocalyptic number.

926978063209 is the 962797-th square number.

926978063209 is the 481399-th centered octagonal number.

It is an amenable number.

926978063209 is a deficient number, since it is larger than the sum of its proper divisors (116422578956).

926978063209 is an frugal number, since it uses more digits than its factorization.

926978063209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 926978063209 in words is "nine hundred twenty-six billion, nine hundred seventy-eight million, sixty-three thousand, two hundred nine".