2853661 has 2 divisors, whose sum is σ = 2853662. Its totient is φ = 2853660.

The previous prime is 2853659. The next prime is 2853673. The reversal of 2853661 is 1663582.

2853661 = 1194² + 1195².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1428025 + 1425636 = 1195^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2853661 - 2¹ = 2853659 is a prime.

It is a super-2 number, since 2×2853661² = 16286762205842, which contains 22 as substring.

Together with 2853659, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2853601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1426830 + 1426831.

It is an arithmetic number, because the mean of its divisors is an integer number (1426831).

2^2853661 is an apocalyptic number.

2853661 is the 1195-th centered square number.

It is an amenable number.

2853661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2853661 is an equidigital number, since it uses as much as digits as its factorization.

2853661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 2853661 is about 1689.2782482469. The cubic root of 2853661 is about 141.8406762951.

The spelling of 2853661 in words is "two million, eight hundred fifty-three thousand, six hundred sixty-one".