3650681 has 4 divisors (see below), whose sum is σ = 3739764. Its totient is φ = 3561600.

The previous prime is 3650677. The next prime is 3650683. The reversal of 3650681 is 1860563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1860563 = 149 ⋅12487.

It can be written as a sum of positive squares in 2 ways, for example, as 116281 + 3534400 = 341^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 3650681 - 2² = 3650677 is a prime.

It is a super-2 number, since 2×3650681² = 26654943527522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3650683) 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, 44480 + ... + 44561.

It is an arithmetic number, because the mean of its divisors is an integer number (934941).

Almost surely, 2^3650681 is an apocalyptic number.

It is an amenable number.

3650681 is a deficient number, since it is larger than the sum of its proper divisors (89083).

3650681 is an equidigital number, since it uses as much as digits as its factorization.

3650681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89082.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3650681 is about 1910.6755349876. The cubic root of 3650681 is about 153.9777473891.

The spelling of 3650681 in words is "three million, six hundred fifty thousand, six hundred eighty-one".