2031017993 has 2 divisors, whose sum is σ = 2031017994. Its totient is φ = 2031017992.

The previous prime is 2031017971. The next prime is 2031018029. The reversal of 2031017993 is 3997101302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815867769 + 215150224 = 42613^2 + 14668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031017993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2031017903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015508996 + 1015508997.

It is an arithmetic number, because the mean of its divisors is an integer number (1015508997).

Almost surely, 2^2031017993 is an apocalyptic number.

It is an amenable number.

2031017993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031017993 is an equidigital number, since it uses as much as digits as its factorization.

2031017993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 2031017993 is about 45066.8169832306. The cubic root of 2031017993 is about 1266.4010354883.

The spelling of 2031017993 in words is "two billion, thirty-one million, seventeen thousand, nine hundred ninety-three".