2729689 has 8 divisors (see below), whose sum is σ = 2817032. Its totient is φ = 2643840.

The previous prime is 2729681. The next prime is 2729717. The reversal of 2729689 is 9869272.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 153664 + 2576025 = 392^2 + 1605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2729689 - 2³ = 2729681 is a prime.

It is a Duffinian number.

2729689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2729681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4147 + ... + 4759.

It is an arithmetic number, because the mean of its divisors is an integer number (352129).

2^2729689 is an apocalyptic number.

It is an amenable number.

2729689 is a deficient number, since it is larger than the sum of its proper divisors (87343).

2729689 is an equidigital number, since it uses as much as digits as its factorization.

2729689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its digits is 108864, while the sum is 43.

The square root of 2729689 is about 1652.1770486240. The cubic root of 2729689 is about 139.7561913022.

The spelling of 2729689 in words is "two million, seven hundred twenty-nine thousand, six hundred eighty-nine".