3698729 has 4 divisors (see below), whose sum is σ = 3743376. Its totient is φ = 3654084.

The previous prime is 3698719. The next prime is 3698753. The reversal of 3698729 is 9278963.

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 not a de Polignac number, because 3698729 - 2⁴ = 3698713 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3698729.

It is not an unprimeable number, because it can be changed into a prime (3698719) 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, 22199 + ... + 22364.

It is an arithmetic number, because the mean of its divisors is an integer number (935844).

Almost surely, 2^3698729 is an apocalyptic number.

It is an amenable number.

3698729 is a deficient number, since it is larger than the sum of its proper divisors (44647).

3698729 is an equidigital number, since it uses as much as digits as its factorization.

3698729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44646.

The product of its digits is 163296, while the sum is 44.

The square root of 3698729 is about 1923.2079970716. The cubic root of 3698729 is about 154.6503251619.

The spelling of 3698729 in words is "three million, six hundred ninety-eight thousand, seven hundred twenty-nine".