1012019993 has 2 divisors, whose sum is σ = 1012019994. Its totient is φ = 1012019992.

The previous prime is 1012019887. The next prime is 1012020019. The reversal of 1012019993 is 3999102101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970197904 + 41822089 = 31148^2 + 6467^2 .

It is an emirp because it is prime and its reverse (3999102101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012019993 - 2²⁸ = 743584537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012012993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506009996 + 506009997.

It is an arithmetic number, because the mean of its divisors is an integer number (506009997).

Almost surely, 2^1012019993 is an apocalyptic number.

It is an amenable number.

1012019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012019993 is an equidigital number, since it uses as much as digits as its factorization.

1012019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 1012019993 is about 31812.2616769069. The cubic root of 1012019993 is about 1003.9907173234.

The spelling of 1012019993 in words is "one billion, twelve million, nineteen thousand, nine hundred ninety-three".