993999983 has 2 divisors, whose sum is σ = 993999984. Its totient is φ = 993999982.

The previous prime is 993999973. The next prime is 994000037. The reversal of 993999983 is 389999399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 993999983 - 2²² = 989805679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993999913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496999991 + 496999992.

It is an arithmetic number, because the mean of its divisors is an integer number (496999992).

Almost surely, 2^993999983 is an apocalyptic number.

993999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

993999983 is an equidigital number, since it uses as much as digits as its factorization.

993999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38263752, while the sum is 68.

The square root of 993999983 is about 31527.7652712653. The cubic root of 993999983 is about 997.9959809237.

The spelling of 993999983 in words is "nine hundred ninety-three million, nine hundred ninety-nine thousand, nine hundred eighty-three".