2689431 has 16 divisors (see below), whose sum is σ = 3907200. Its totient is φ = 1639008.

The previous prime is 2689411. The next prime is 2689439. The reversal of 2689431 is 1349862.

It is not a de Polignac number, because 2689431 - 2⁵ = 2689399 is a prime.

It is a super-2 number, since 2×2689431² = 14466078207522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2689392 and 2689401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (244200).

2^2689431 is an apocalyptic number.

2689431 is a deficient number, since it is larger than the sum of its proper divisors (1217769).

2689431 is a wasteful number, since it uses less digits than its factorization.

2689431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its digits is 10368, while the sum is 33.

The square root of 2689431 is about 1639.9484748004. The cubic root of 2689431 is about 139.0657350003.

The spelling of 2689431 in words is "two million, six hundred eighty-nine thousand, four hundred thirty-one".