988291639 has 2 divisors, whose sum is σ = 988291640. Its totient is φ = 988291638.

The previous prime is 988291613. The next prime is 988291679. The reversal of 988291639 is 936192889.

988291639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (936192889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 988291639 - 2¹³ = 988283447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 988291639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988291679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494145819 + 494145820.

It is an arithmetic number, because the mean of its divisors is an integer number (494145820).

Almost surely, 2^988291639 is an apocalyptic number.

988291639 is a deficient number, since it is larger than the sum of its proper divisors (1).

988291639 is an equidigital number, since it uses as much as digits as its factorization.

988291639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 55.

The square root of 988291639 is about 31437.1060850073. The cubic root of 988291639 is about 996.0818813965.

The spelling of 988291639 in words is "nine hundred eighty-eight million, two hundred ninety-one thousand, six hundred thirty-nine".