2091709031 has 8 divisors (see below), whose sum is σ = 2203286400. Its totient is φ = 1980280440.

The previous prime is 2091708977. The next prime is 2091709051. The reversal of 2091709031 is 1309071902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091709031 - 2¹⁸ = 2091446887 is a prime.

It is a super-2 number, since 2×2091709031² = 8750493340733917922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091709051) 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 in 7 ways as a sum of consecutive naturals, for example, 7721 + ... + 65138.

It is an arithmetic number, because the mean of its divisors is an integer number (275410800).

Almost surely, 2^2091709031 is an apocalyptic number.

2091709031 is a deficient number, since it is larger than the sum of its proper divisors (111577369).

2091709031 is a wasteful number, since it uses less digits than its factorization.

2091709031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74389.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 2091709031 is about 45735.2055970015. The cubic root of 2091709031 is about 1278.8916657077.

The spelling of 2091709031 in words is "two billion, ninety-one million, seven hundred nine thousand, thirty-one".