1711023991 has 2 divisors, whose sum is σ = 1711023992. Its totient is φ = 1711023990.

The previous prime is 1711023989. The next prime is 1711024009. The reversal of 1711023991 is 1993201171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1711023991 - 2¹ = 1711023989 is a prime.

Together with 1711023989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1711023491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 855511995 + 855511996.

It is an arithmetic number, because the mean of its divisors is an integer number (855511996).

Almost surely, 2^1711023991 is an apocalyptic number.

1711023991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1711023991 is an equidigital number, since it uses as much as digits as its factorization.

1711023991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 1711023991 is about 41364.5257557729. The cubic root of 1711023991 is about 1196.0574292528.

The spelling of 1711023991 in words is "one billion, seven hundred eleven million, twenty-three thousand, nine hundred ninety-one".