8020657 has 4 divisors (see below), whose sum is σ = 8133696. Its totient is φ = 7907620.

The previous prime is 8020643. The next prime is 8020669. The reversal of 8020657 is 7560208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8020657 - 2¹¹ = 8018609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8020687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56413 + ... + 56554.

It is an arithmetic number, because the mean of its divisors is an integer number (2033424).

Almost surely, 2^8020657 is an apocalyptic number.

It is an amenable number.

8020657 is a deficient number, since it is larger than the sum of its proper divisors (113039).

8020657 is a wasteful number, since it uses less digits than its factorization.

8020657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113038.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 8020657 is about 2832.0764467083. The cubic root of 8020657 is about 200.1719937151.

The spelling of 8020657 in words is "eight million, twenty thousand, six hundred fifty-seven".