4638657 has 4 divisors (see below), whose sum is σ = 6184880. Its totient is φ = 3092436.

The previous prime is 4638631. The next prime is 4638659. The reversal of 4638657 is 7568364.

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 not a de Polignac number, because 4638657 - 2¹¹ = 4636609 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4638659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773107 + ... + 773112.

It is an arithmetic number, because the mean of its divisors is an integer number (1546220).

Almost surely, 2^4638657 is an apocalyptic number.

It is an amenable number.

4638657 is a deficient number, since it is larger than the sum of its proper divisors (1546223).

4638657 is a wasteful number, since it uses less digits than its factorization.

4638657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546222.

The product of its digits is 120960, while the sum is 39.

The square root of 4638657 is about 2153.7541642444. The cubic root of 4638657 is about 166.7749247770.

The spelling of 4638657 in words is "four million, six hundred thirty-eight thousand, six hundred fifty-seven".