999900079 has 2 divisors, whose sum is σ = 999900080. Its totient is φ = 999900078.

The previous prime is 999900059. The next prime is 999900107. The reversal of 999900079 is 970009999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999900079 - 2⁵ = 999900047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999899999 and 999900035.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999900059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499950039 + 499950040.

It is an arithmetic number, because the mean of its divisors is an integer number (499950040).

Almost surely, 2^999900079 is an apocalyptic number.

999900079 is a deficient number, since it is larger than the sum of its proper divisors (1).

999900079 is an equidigital number, since it uses as much as digits as its factorization.

999900079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 413343, while the sum is 52.

The square root of 999900079 is about 31621.1966724854. The cubic root of 999900079 is about 999.9666918906.

The spelling of 999900079 in words is "nine hundred ninety-nine million, nine hundred thousand, seventy-nine".