3634861 has 2 divisors, whose sum is σ = 3634862. Its totient is φ = 3634860.

The previous prime is 3634859. The next prime is 3634877. The reversal of 3634861 is 1684363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3632836 + 2025 = 1906^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 3634861 - 2¹ = 3634859 is a prime.

Together with 3634859, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₂₅₉₀₉₆ and since 3634861 and 259096 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3634801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1817430 + 1817431.

It is an arithmetic number, because the mean of its divisors is an integer number (1817431).

Almost surely, 2^3634861 is an apocalyptic number.

It is an amenable number.

3634861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3634861 is an equidigital number, since it uses as much as digits as its factorization.

3634861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 3634861 is about 1906.5311432022. The cubic root of 3634861 is about 153.7550076585.

The spelling of 3634861 in words is "three million, six hundred thirty-four thousand, eight hundred sixty-one".