4891657 has 8 divisors (see below), whose sum is σ = 5010984. Its totient is φ = 4773888.

The previous prime is 4891643. The next prime is 4891661. The reversal of 4891657 is 7561984.

It can be written as a sum of positive squares in 4 ways, for example, as 121801 + 4769856 = 349^2 + 2184^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4891657 - 2¹¹ = 4889609 is a prime.

It is a Duffinian number.

4891657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4891057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7953 + ... + 8545.

It is an arithmetic number, because the mean of its divisors is an integer number (626373).

Almost surely, 2^4891657 is an apocalyptic number.

It is an amenable number.

4891657 is a deficient number, since it is larger than the sum of its proper divisors (119327).

4891657 is a wasteful number, since it uses less digits than its factorization.

4891657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 60480, while the sum is 40.

The square root of 4891657 is about 2211.7090676669. The cubic root of 4891657 is about 169.7534719629.

The spelling of 4891657 in words is "four million, eight hundred ninety-one thousand, six hundred fifty-seven".