2009696831 has 4 divisors (see below), whose sum is σ = 2018036064. Its totient is φ = 2001357600.

The previous prime is 2009696813. The next prime is 2009696849. The reversal of 2009696831 is 1386969002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1386969002 = 2 ⋅693484501.

It is an interprime number because it is at equal distance from previous prime (2009696813) and next prime (2009696849).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009696831 is a prime.

It is a super-2 number, since 2×2009696831² = 8077762705062885122, 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 (2009696431) 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 3 ways as a sum of consecutive naturals, for example, 4169255 + ... + 4169736.

It is an arithmetic number, because the mean of its divisors is an integer number (504509016).

Almost surely, 2^2009696831 is an apocalyptic number.

2009696831 is a deficient number, since it is larger than the sum of its proper divisors (8339233).

2009696831 is an equidigital number, since it uses as much as digits as its factorization.

2009696831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8339232.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 2009696831 is about 44829.6423251402. The cubic root of 2009696831 is about 1261.9539748536.

The spelling of 2009696831 in words is "two billion, nine million, six hundred ninety-six thousand, eight hundred thirty-one".