981349321 has 4 divisors (see below), whose sum is σ = 981569044. Its totient is φ = 981129600.

The previous prime is 981349319. The next prime is 981349339. The reversal of 981349321 is 123943189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123943189 = 181 ⋅684769.

It can be written as a sum of positive squares in 2 ways, for example, as 611325625 + 370023696 = 24725^2 + 19236^2 .

It is a cyclic number.

It is not a de Polignac number, because 981349321 - 2¹ = 981349319 is a prime.

It is a super-2 number, since 2×981349321² = 1926092979654322082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981349121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103020 + ... + 112141.

It is an arithmetic number, because the mean of its divisors is an integer number (245392261).

Almost surely, 2^981349321 is an apocalyptic number.

It is an amenable number.

981349321 is a deficient number, since it is larger than the sum of its proper divisors (219723).

981349321 is a wasteful number, since it uses less digits than its factorization.

981349321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219722.

The product of its digits is 46656, while the sum is 40.

The square root of 981349321 is about 31326.4955109888. The cubic root of 981349321 is about 993.7440517240.

The spelling of 981349321 in words is "nine hundred eighty-one million, three hundred forty-nine thousand, three hundred twenty-one".