999179047 has 2 divisors, whose sum is σ = 999179048. Its totient is φ = 999179046.

The previous prime is 999179039. The next prime is 999179099. The reversal of 999179047 is 740971999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999179047 - 2³ = 999179039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999189047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499589523 + 499589524.

It is an arithmetic number, because the mean of its divisors is an integer number (499589524).

Almost surely, 2^999179047 is an apocalyptic number.

999179047 is a deficient number, since it is larger than the sum of its proper divisors (1).

999179047 is an equidigital number, since it uses as much as digits as its factorization.

999179047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1285956, while the sum is 55.

The square root of 999179047 is about 31609.7935298540. The cubic root of 999179047 is about 999.7262740810.

The spelling of 999179047 in words is "nine hundred ninety-nine million, one hundred seventy-nine thousand, forty-seven".