990000679 has 2 divisors, whose sum is σ = 990000680. Its totient is φ = 990000678.

The previous prime is 990000647. The next prime is 990000689. The reversal of 990000679 is 976000099.

It is a strong prime.

It is an emirp because it is prime and its reverse (976000099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990000679 - 2⁵ = 990000647 is a prime.

It is a super-2 number, since 2×990000679² = 1960202688840922082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990000619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495000339 + 495000340.

It is an arithmetic number, because the mean of its divisors is an integer number (495000340).

Almost surely, 2^990000679 is an apocalyptic number.

990000679 is a deficient number, since it is larger than the sum of its proper divisors (1).

990000679 is an equidigital number, since it uses as much as digits as its factorization.

990000679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 990000679 is about 31464.2762351210. The cubic root of 990000679 is about 996.6557212675.

The spelling of 990000679 in words is "nine hundred ninety million, six hundred seventy-nine", and thus it is an aban number.