981322523 has 8 divisors (see below), whose sum is σ = 990647808. Its totient is φ = 972022464.

The previous prime is 981322513. The next prime is 981322543. The reversal of 981322523 is 325223189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981322523 - 2¹⁰ = 981321499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981322513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77015 + ... + 88847.

It is an arithmetic number, because the mean of its divisors is an integer number (123830976).

Almost surely, 2^981322523 is an apocalyptic number.

981322523 is a deficient number, since it is larger than the sum of its proper divisors (9325285).

981322523 is a wasteful number, since it uses less digits than its factorization.

981322523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12613.

The product of its digits is 25920, while the sum is 35.

The square root of 981322523 is about 31326.0677870683. The cubic root of 981322523 is about 993.7350061527.

The spelling of 981322523 in words is "nine hundred eighty-one million, three hundred twenty-two thousand, five hundred twenty-three".