98819639 has 2 divisors, whose sum is σ = 98819640. Its totient is φ = 98819638.

The previous prime is 98819629. The next prime is 98819671. The reversal of 98819639 is 93691889.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98819639 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 (98819629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49409819 + 49409820.

It is an arithmetic number, because the mean of its divisors is an integer number (49409820).

Almost surely, 2^98819639 is an apocalyptic number.

98819639 is a deficient number, since it is larger than the sum of its proper divisors (1).

98819639 is an equidigital number, since it uses as much as digits as its factorization.

98819639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 98819639 is about 9940.8067580051. The cubic root of 98819639 is about 462.3254002743.

The spelling of 98819639 in words is "ninety-eight million, eight hundred nineteen thousand, six hundred thirty-nine".