984136881 has 64 divisors (see below), whose sum is σ = 1684766720. Its totient is φ = 497041920.

The previous prime is 984136873. The next prime is 984136883. The reversal of 984136881 is 188631489.

It is not a de Polignac number, because 984136881 - 2³ = 984136873 is a prime.

It is a super-2 number, since 2×984136881² = 1937050801088816322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 984136881.

It is not an unprimeable number, because it can be changed into a prime (984136883) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 871125 + ... + 872253.

It is an arithmetic number, because the mean of its divisors is an integer number (26324480).

Almost surely, 2^984136881 is an apocalyptic number.

984136881 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

984136881 is a deficient number, since it is larger than the sum of its proper divisors (700629839).

984136881 is a wasteful number, since it uses less digits than its factorization.

984136881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286.

The product of its digits is 331776, while the sum is 48.

The square root of 984136881 is about 31370.9560102972. The cubic root of 984136881 is about 994.6840847862.

The spelling of 984136881 in words is "nine hundred eighty-four million, one hundred thirty-six thousand, eight hundred eighty-one".