3617641 has 2 divisors, whose sum is σ = 3617642. Its totient is φ = 3617640.

The previous prime is 3617639. The next prime is 3617659. The reversal of 3617641 is 1467163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2903616 + 714025 = 1704^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 3617641 - 2¹ = 3617639 is a prime.

Together with 3617639, it forms a pair of twin primes.

It is an Ulam number.

It is equal to p₂₅₇₉₄₁ and since 3617641 and 257941 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (3617611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808820 + 1808821.

It is an arithmetic number, because the mean of its divisors is an integer number (1808821).

Almost surely, 2^3617641 is an apocalyptic number.

It is an amenable number.

3617641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3617641 is an equidigital number, since it uses as much as digits as its factorization.

3617641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 3617641 is about 1902.0097265787. The cubic root of 3617641 is about 153.5118206121.

The spelling of 3617641 in words is "three million, six hundred seventeen thousand, six hundred forty-one".