999972067 has 2 divisors, whose sum is σ = 999972068. Its totient is φ = 999972066.

The previous prime is 999972059. The next prime is 999972089. The reversal of 999972067 is 760279999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999972067 - 2³ = 999972059 is a prime.

It is not a weakly prime, because it can be changed into another prime (999972007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499986033 + 499986034.

It is an arithmetic number, because the mean of its divisors is an integer number (499986034).

Almost surely, 2^999972067 is an apocalyptic number.

999972067 is a deficient number, since it is larger than the sum of its proper divisors (1).

999972067 is an equidigital number, since it uses as much as digits as its factorization.

999972067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3857868, while the sum is 58.

The square root of 999972067 is about 31622.3349390901. The cubic root of 999972067 is about 999.9906889133.

The spelling of 999972067 in words is "nine hundred ninety-nine million, nine hundred seventy-two thousand, sixty-seven".