988141921 has 4 divisors (see below), whose sum is σ = 1064152852. Its totient is φ = 912130992.

The previous prime is 988141879. The next prime is 988141937. The reversal of 988141921 is 129141889.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129141889 = 227 ⋅568907.

It can be written as a sum of positive squares in 2 ways, for example, as 588741696 + 399400225 = 24264^2 + 19985^2 .

It is a cyclic number.

It is not a de Polignac number, because 988141921 - 2⁷ = 988141793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988141961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38005446 + ... + 38005471.

It is an arithmetic number, because the mean of its divisors is an integer number (266038213).

Almost surely, 2^988141921 is an apocalyptic number.

It is an amenable number.

988141921 is a deficient number, since it is larger than the sum of its proper divisors (76010931).

988141921 is a wasteful number, since it uses less digits than its factorization.

988141921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76010930.

The product of its digits is 41472, while the sum is 43.

The square root of 988141921 is about 31434.7247641840. The cubic root of 988141921 is about 996.0315794705.

The spelling of 988141921 in words is "nine hundred eighty-eight million, one hundred forty-one thousand, nine hundred twenty-one".