981579265 has 4 divisors (see below), whose sum is σ = 1177895124. Its totient is φ = 785263408.

The previous prime is 981579259. The next prime is 981579271. The reversal of 981579265 is 562975189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562975189 = 7 ⋅80425027.

It is an interprime number because it is at equal distance from previous prime (981579259) and next prime (981579271).

It can be written as a sum of positive squares in 2 ways, for example, as 113039424 + 868539841 = 10632^2 + 29471^2 .

It is a cyclic number.

It is not a de Polignac number, because 981579265 - 2⁹ = 981578753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98157922 + ... + 98157931.

It is an arithmetic number, because the mean of its divisors is an integer number (294473781).

Almost surely, 2^981579265 is an apocalyptic number.

It is an amenable number.

981579265 is a deficient number, since it is larger than the sum of its proper divisors (196315859).

981579265 is a wasteful number, since it uses less digits than its factorization.

981579265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196315858.

The product of its digits is 1360800, while the sum is 52.

The square root of 981579265 is about 31330.1654160970. The cubic root of 981579265 is about 993.8216617494.

The spelling of 981579265 in words is "nine hundred eighty-one million, five hundred seventy-nine thousand, two hundred sixty-five".