981323117 has 2 divisors, whose sum is σ = 981323118. Its totient is φ = 981323116.

The previous prime is 981323099. The next prime is 981323137. The reversal of 981323117 is 711323189.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753282916 + 228040201 = 27446^2 + 15101^2 .

It is a cyclic number.

It is not a de Polignac number, because 981323117 - 2²⁸ = 712887661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981323137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490661558 + 490661559.

It is an arithmetic number, because the mean of its divisors is an integer number (490661559).

Almost surely, 2^981323117 is an apocalyptic number.

It is an amenable number.

981323117 is a deficient number, since it is larger than the sum of its proper divisors (1).

981323117 is an equidigital number, since it uses as much as digits as its factorization.

981323117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 981323117 is about 31326.0772679887. The cubic root of 981323117 is about 993.7352066571.

The spelling of 981323117 in words is "nine hundred eighty-one million, three hundred twenty-three thousand, one hundred seventeen".