2739681 has 12 divisors (see below), whose sum is σ = 4522752. Its totient is φ = 1565496.

The previous prime is 2739673. The next prime is 2739683. The reversal of 2739681 is 1869372.

It is not a de Polignac number, because 2739681 - 2³ = 2739673 is a prime.

It is a super-2 number, since 2×2739681² = 15011703963522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2739683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21681 + ... + 21806.

It is an arithmetic number, because the mean of its divisors is an integer number (376896).

2^2739681 is an apocalyptic number.

2739681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2739681 is a deficient number, since it is larger than the sum of its proper divisors (1783071).

2739681 is a wasteful number, since it uses less digits than its factorization.

2739681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43500 (or 43497 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2739681 is about 1655.1981754461. The cubic root of 2739681 is about 139.9265090478.

The spelling of 2739681 in words is "two million, seven hundred thirty-nine thousand, six hundred eighty-one".