2684731 has 4 divisors (see below), whose sum is σ = 3068272. Its totient is φ = 2301192.

The previous prime is 2684711. The next prime is 2684743. The reversal of 2684731 is 1374862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1374862 = 2 ⋅687431.

It is a cyclic number.

It is not a de Polignac number, because 2684731 - 2⁹ = 2684219 is a prime.

It is a super-2 number, since 2×2684731² = 14415561084722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁶ + 8⁷ + 4⁷ + 7 + 3⁵ + 1 .

It is a Duffinian number.

2684731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2684693 and 2684702.

It is not an unprimeable number, because it can be changed into a prime (2684701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191760 + ... + 191773.

It is an arithmetic number, because the mean of its divisors is an integer number (767068).

2^2684731 is an apocalyptic number.

2684731 is a deficient number, since it is larger than the sum of its proper divisors (383541).

2684731 is an equidigital number, since it uses as much as digits as its factorization.

2684731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383540.

The product of its digits is 8064, while the sum is 31.

The square root of 2684731 is about 1638.5148763438. The cubic root of 2684731 is about 138.9846781932.

The spelling of 2684731 in words is "two million, six hundred eighty-four thousand, seven hundred thirty-one".