999768031 has 2 divisors, whose sum is σ = 999768032. Its totient is φ = 999768030.

The previous prime is 999768013. The next prime is 999768043. The reversal of 999768031 is 130867999.

Together with previous prime (999768013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999768031 - 2¹¹ = 999765983 is a prime.

It is a super-2 number, since 2×999768031² = 1999072231619233922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999768031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999768001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499884015 + 499884016.

It is an arithmetic number, because the mean of its divisors is an integer number (499884016).

Almost surely, 2^999768031 is an apocalyptic number.

999768031 is a deficient number, since it is larger than the sum of its proper divisors (1).

999768031 is an equidigital number, since it uses as much as digits as its factorization.

999768031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 999768031 is about 31619.1086370252. The cubic root of 999768031 is about 999.9226710204.

The spelling of 999768031 in words is "nine hundred ninety-nine million, seven hundred sixty-eight thousand, thirty-one".