2738681 has 4 divisors (see below), whose sum is σ = 2987664. Its totient is φ = 2489700.

The previous prime is 2738657. The next prime is 2738707. The reversal of 2738681 is 1868372.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2738681 is a prime.

It is a super-2 number, since 2×2738681² = 15000747239522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2738621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124475 + ... + 124496.

It is an arithmetic number, because the mean of its divisors is an integer number (746916).

2^2738681 is an apocalyptic number.

It is an amenable number.

2738681 is a deficient number, since it is larger than the sum of its proper divisors (248983).

2738681 is a wasteful number, since it uses less digits than its factorization.

2738681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248982.

The product of its digits is 16128, while the sum is 35.

The square root of 2738681 is about 1654.8960692442. The cubic root of 2738681 is about 139.9094823043.

The spelling of 2738681 in words is "two million, seven hundred thirty-eight thousand, six hundred eighty-one".