1020039191 has 2 divisors, whose sum is σ = 1020039192. Its totient is φ = 1020039190.

The previous prime is 1020039169. The next prime is 1020039193. The reversal of 1020039191 is 1919300201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020039191 is a prime.

Together with 1020039193, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020039191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020039193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510019595 + 510019596.

It is an arithmetic number, because the mean of its divisors is an integer number (510019596).

Almost surely, 2^1020039191 is an apocalyptic number.

1020039191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020039191 is an equidigital number, since it uses as much as digits as its factorization.

1020039191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1020039191 is about 31938.0523983539. The cubic root of 1020039191 is about 1006.6356017318.

Adding to 1020039191 its reverse (1919300201), we get a palindrome (2939339392).

The spelling of 1020039191 in words is "one billion, twenty million, thirty-nine thousand, one hundred ninety-one".