1001191511 has 2 divisors, whose sum is σ = 1001191512. Its totient is φ = 1001191510.

The previous prime is 1001191501. The next prime is 1001191517. The reversal of 1001191511 is 1151911001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001191511 - 2²² = 996997207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001191517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500595755 + 500595756.

It is an arithmetic number, because the mean of its divisors is an integer number (500595756).

Almost surely, 2^1001191511 is an apocalyptic number.

1001191511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001191511 is an equidigital number, since it uses as much as digits as its factorization.

1001191511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45, while the sum is 20.

The square root of 1001191511 is about 31641.6104362594. The cubic root of 1001191511 is about 1000.3970126934.

The spelling of 1001191511 in words is "one billion, one million, one hundred ninety-one thousand, five hundred eleven".