98831639 has 2 divisors, whose sum is σ = 98831640. Its totient is φ = 98831638.

The previous prime is 98831617. The next prime is 98831671. The reversal of 98831639 is 93613889.

It is a weak prime.

It is an emirp because it is prime and its reverse (93613889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98831639 - 2¹² = 98827543 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 98831593 and 98831602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98831609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49415819 + 49415820.

It is an arithmetic number, because the mean of its divisors is an integer number (49415820).

Almost surely, 2^98831639 is an apocalyptic number.

98831639 is a deficient number, since it is larger than the sum of its proper divisors (1).

98831639 is an equidigital number, since it uses as much as digits as its factorization.

98831639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 98831639 is about 9941.4103124255. The cubic root of 98831639 is about 462.3441134246.

The spelling of 98831639 in words is "ninety-eight million, eight hundred thirty-one thousand, six hundred thirty-nine".