988968281 has 4 divisors (see below), whose sum is σ = 1130249472. Its totient is φ = 847687092.

The previous prime is 988968269. The next prime is 988968317. The reversal of 988968281 is 182869889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 988968281 - 2¹⁰ = 988967257 is a prime.

It is a super-2 number, since 2×988968281² = 1956116521648189922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 988968281.

It is not an unprimeable number, because it can be changed into a prime (988968241) 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, 70640585 + ... + 70640598.

It is an arithmetic number, because the mean of its divisors is an integer number (282562368).

Almost surely, 2^988968281 is an apocalyptic number.

It is an amenable number.

988968281 is a deficient number, since it is larger than the sum of its proper divisors (141281191).

988968281 is a wasteful number, since it uses less digits than its factorization.

988968281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141281190.

The product of its digits is 3981312, while the sum is 59.

The square root of 988968281 is about 31447.8660802287. The cubic root of 988968281 is about 996.3091547540.

The spelling of 988968281 in words is "nine hundred eighty-eight million, nine hundred sixty-eight thousand, two hundred eighty-one".