3637961 has 4 divisors (see below), whose sum is σ = 3642624. Its totient is φ = 3633300.

The previous prime is 3637957. The next prime is 3637967. The reversal of 3637961 is 1697363.

3637961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1697363 = 241 ⋅7043.

It is a cyclic number.

It is not a de Polignac number, because 3637961 - 2² = 3637957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3637967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845 + ... + 2826.

It is an arithmetic number, because the mean of its divisors is an integer number (910656).

Almost surely, 2^3637961 is an apocalyptic number.

It is an amenable number.

3637961 is a deficient number, since it is larger than the sum of its proper divisors (4663).

3637961 is an equidigital number, since it uses as much as digits as its factorization.

3637961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662.

The product of its digits is 20412, while the sum is 35.

The square root of 3637961 is about 1907.3439647845. The cubic root of 3637961 is about 153.7987053484.

The spelling of 3637961 in words is "three million, six hundred thirty-seven thousand, nine hundred sixty-one".