2709681 has 32 divisors (see below), whose sum is σ = 4249728. Its totient is φ = 1520640.

The previous prime is 2709677. The next prime is 2709709. The reversal of 2709681 is 1869072.

It is not a de Polignac number, because 2709681 - 2² = 2709677 is a prime.

It is a super-2 number, since 2×2709681² = 14684742243522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2709601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40410 + ... + 40476.

It is an arithmetic number, because the mean of its divisors is an integer number (132804).

2^2709681 is an apocalyptic number.

It is an amenable number.

2709681 is a deficient number, since it is larger than the sum of its proper divisors (1540047).

2709681 is a wasteful number, since it uses less digits than its factorization.

2709681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2709681 is about 1646.1108711141. The cubic root of 2709681 is about 139.4138932392.

The spelling of 2709681 in words is "two million, seven hundred nine thousand, six hundred eighty-one".