983609881 has 16 divisors (see below), whose sum is σ = 1079516160. Its totient is φ = 893280960.

The previous prime is 983609863. The next prime is 983609899. The reversal of 983609881 is 188906389.

It is an interprime number because it is at equal distance from previous prime (983609863) and next prime (983609899).

It is a cyclic number.

It is not a de Polignac number, because 983609881 - 2²¹ = 981512729 is a prime.

It is a super-2 number, since 2×983609881² = 1934976796001668322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (983609801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24775 + ... + 50803.

It is an arithmetic number, because the mean of its divisors is an integer number (67469760).

Almost surely, 2^983609881 is an apocalyptic number.

It is an amenable number.

983609881 is a deficient number, since it is larger than the sum of its proper divisors (95906279).

983609881 is a wasteful number, since it uses less digits than its factorization.

983609881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26136.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 983609881 is about 31362.5553965234. Note that the first 3 decimals coincide. The cubic root of 983609881 is about 994.5065037609.

It can be divided in two parts, 98360 and 9881, that added together give a square (108241 = 329²).

The spelling of 983609881 in words is "nine hundred eighty-three million, six hundred nine thousand, eight hundred eighty-one".