99984679 has 2 divisors, whose sum is σ = 99984680. Its totient is φ = 99984678.

The previous prime is 99984629. The next prime is 99984697. The reversal of 99984679 is 97648999.

Together with next prime (99984697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99984679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99984629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992339 + 49992340.

It is an arithmetic number, because the mean of its divisors is an integer number (49992340).

Almost surely, 2^99984679 is an apocalyptic number.

99984679 is a deficient number, since it is larger than the sum of its proper divisors (1).

99984679 is an equidigital number, since it uses as much as digits as its factorization.

99984679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 61.

The square root of 99984679 is about 9999.2339206561. The cubic root of 99984679 is about 464.1351775564.

The spelling of 99984679 in words is "ninety-nine million, nine hundred eighty-four thousand, six hundred seventy-nine".