988579421 has 2 divisors, whose sum is σ = 988579422. Its totient is φ = 988579420.

The previous prime is 988579387. The next prime is 988579433. The reversal of 988579421 is 124975889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978813796 + 9765625 = 31286^2 + 3125^2 .

It is an emirp because it is prime and its reverse (124975889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 988579421 - 2¹⁰ = 988578397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988579451) 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 as a sum of consecutive naturals, namely, 494289710 + 494289711.

It is an arithmetic number, because the mean of its divisors is an integer number (494289711).

Almost surely, 2^988579421 is an apocalyptic number.

It is an amenable number.

988579421 is a deficient number, since it is larger than the sum of its proper divisors (1).

988579421 is an equidigital number, since it uses as much as digits as its factorization.

988579421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 53.

The square root of 988579421 is about 31441.6828589056. The cubic root of 988579421 is about 996.1785554973.

The spelling of 988579421 in words is "nine hundred eighty-eight million, five hundred seventy-nine thousand, four hundred twenty-one".