1002115091 has 2 divisors, whose sum is σ = 1002115092. Its totient is φ = 1002115090.

The previous prime is 1002115069. The next prime is 1002115159. The reversal of 1002115091 is 1905112001.

1002115091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002115091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002115001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501057545 + 501057546.

It is an arithmetic number, because the mean of its divisors is an integer number (501057546).

Almost surely, 2^1002115091 is an apocalyptic number.

1002115091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002115091 is an equidigital number, since it uses as much as digits as its factorization.

1002115091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1002115091 is about 31656.2014619569. The cubic root of 1002115091 is about 1000.7045338488.

Adding to 1002115091 its reverse (1905112001), we get a palindrome (2907227092).

The spelling of 1002115091 in words is "one billion, two million, one hundred fifteen thousand, ninety-one".