1711891005 has 16 divisors (see below), whose sum is σ = 2988028224. Its totient is φ = 830007680.

The previous prime is 1711890997. The next prime is 1711891061. The reversal of 1711891005 is 5001981171.

It is not a de Polignac number, because 1711891005 - 2³ = 1711890997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5187384 + ... + 5187713.

It is an arithmetic number, because the mean of its divisors is an integer number (186751764).

Almost surely, 2^1711891005 is an apocalyptic number.

1711891005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1711891005 is a deficient number, since it is larger than the sum of its proper divisors (1276137219).

1711891005 is a wasteful number, since it uses less digits than its factorization.

1711891005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10375116.

The product of its (nonzero) digits is 2520, while the sum is 33.

The square root of 1711891005 is about 41375.0045921448. The cubic root of 1711891005 is about 1196.2594181269.

The spelling of 1711891005 in words is "one billion, seven hundred eleven million, eight hundred ninety-one thousand, five".