2691139 has 8 divisors (see below), whose sum is σ = 2948400. Its totient is φ = 2436000.

The previous prime is 2691131. The next prime is 2691149. The reversal of 2691139 is 9311962.

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 2691139 - 2³ = 2691131 is a prime.

It is a Duffinian number.

2691139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2691139.

It is not an unprimeable number, because it can be changed into a prime (2691131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489 + ... + 4189.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

2^2691139 is an apocalyptic number.

2691139 is a deficient number, since it is larger than the sum of its proper divisors (257261).

2691139 is a wasteful number, since it uses less digits than its factorization.

2691139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its digits is 2916, while the sum is 31.

The square root of 2691139 is about 1640.4691402157. The cubic root of 2691139 is about 139.0951679932.

The spelling of 2691139 in words is "two million, six hundred ninety-one thousand, one hundred thirty-nine".