999356983 has 2 divisors, whose sum is σ = 999356984. Its totient is φ = 999356982.

The previous prime is 999356957. The next prime is 999356993. The reversal of 999356983 is 389653999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999356983 - 2¹⁷ = 999225911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999356903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499678491 + 499678492.

It is an arithmetic number, because the mean of its divisors is an integer number (499678492).

Almost surely, 2^999356983 is an apocalyptic number.

999356983 is a deficient number, since it is larger than the sum of its proper divisors (1).

999356983 is an equidigital number, since it uses as much as digits as its factorization.

999356983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 61.

The square root of 999356983 is about 31612.6079753000. The cubic root of 999356983 is about 999.7856150424.

The spelling of 999356983 in words is "nine hundred ninety-nine million, three hundred fifty-six thousand, nine hundred eighty-three".