2691009029 has 4 divisors (see below), whose sum is σ = 2697927180. Its totient is φ = 2684090880.

The previous prime is 2691009011. The next prime is 2691009043. The reversal of 2691009029 is 9209001962.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1783372900 + 907636129 = 42230^2 + 30127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2691009029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2691008983 and 2691009001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691009059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3458492 + ... + 3459269.

It is an arithmetic number, because the mean of its divisors is an integer number (674481795).

Almost surely, 2^2691009029 is an apocalyptic number.

It is an amenable number.

2691009029 is a deficient number, since it is larger than the sum of its proper divisors (6918151).

2691009029 is an equidigital number, since it uses as much as digits as its factorization.

2691009029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6918150.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 2691009029 is about 51874.9364240574. The cubic root of 2691009029 is about 1390.9292871472.

The spelling of 2691009029 in words is "two billion, six hundred ninety-one million, nine thousand, twenty-nine".