99900000679 has 2 divisors, whose sum is σ = 99900000680. Its totient is φ = 99900000678.

The previous prime is 99900000643. The next prime is 99900000689. The reversal of 99900000679 is 97600000999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99900000679 - 2¹³ = 99899992487 is a prime.

It is a super-2 number, since 2×99900000679² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99900000619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49950000339 + 49950000340.

It is an arithmetic number, because the mean of its divisors is an integer number (49950000340).

Almost surely, 2^99900000679 is an apocalyptic number.

99900000679 is a deficient number, since it is larger than the sum of its proper divisors (1).

99900000679 is an equidigital number, since it uses as much as digits as its factorization.

99900000679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 49.

The spelling of 99900000679 in words is "ninety-nine billion, nine hundred million, six hundred seventy-nine", and thus it is an aban number.