2881657 has 2 divisors, whose sum is σ = 2881658. Its totient is φ = 2881656.

The previous prime is 2881649. The next prime is 2881699. The reversal of 2881657 is 7561882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2627641 + 254016 = 1621^2 + 504^2 .

It is a cyclic number.

It is not a de Polignac number, because 2881657 - 2³ = 2881649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2881057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1440828 + 1440829.

It is an arithmetic number, because the mean of its divisors is an integer number (1440829).

2^2881657 is an apocalyptic number.

It is an amenable number.

2881657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2881657 is an equidigital number, since it uses as much as digits as its factorization.

2881657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 2881657 is about 1697.5444029539. The cubic root of 2881657 is about 142.3030129307.

The spelling of 2881657 in words is "two million, eight hundred eighty-one thousand, six hundred fifty-seven".