3687740729 has 4 divisors (see below), whose sum is σ = 3696757620. Its totient is φ = 3678723840.

The previous prime is 3687740701. The next prime is 3687740747. The reversal of 3687740729 is 9270477863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9270477863 = 31 ⋅299047673.

It can be written as a sum of positive squares in 2 ways, for example, as 3442755625 + 244985104 = 58675^2 + 15652^2 .

It is a cyclic number.

It is not a de Polignac number, because 3687740729 - 2¹⁶ = 3687675193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3687745729) 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, 4507832 + ... + 4508649.

It is an arithmetic number, because the mean of its divisors is an integer number (924189405).

Almost surely, 2^3687740729 is an apocalyptic number.

It is an amenable number.

3687740729 is a deficient number, since it is larger than the sum of its proper divisors (9016891).

3687740729 is an equidigital number, since it uses as much as digits as its factorization.

3687740729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016890.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The square root of 3687740729 is about 60726.7711063251. The cubic root of 3687740729 is about 1544.9702698133.

The spelling of 3687740729 in words is "three billion, six hundred eighty-seven million, seven hundred forty thousand, seven hundred twenty-nine".