4756639 has 4 divisors (see below), whose sum is σ = 4837320. Its totient is φ = 4675960.

The previous prime is 4756637. The next prime is 4756649. The reversal of 4756639 is 9366574.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4756639 - 2¹ = 4756637 is a prime.

It is a super-2 number, since 2×4756639² = 45251229152642, which contains 22 as substring.

It is a Duffinian number.

4756639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4756637) 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, 40252 + ... + 40369.

It is an arithmetic number, because the mean of its divisors is an integer number (1209330).

Almost surely, 2^4756639 is an apocalyptic number.

4756639 is a deficient number, since it is larger than the sum of its proper divisors (80681).

4756639 is an equidigital number, since it uses as much as digits as its factorization.

4756639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80680.

The product of its digits is 136080, while the sum is 40.

The square root of 4756639 is about 2180.9720309990. The cubic root of 4756639 is about 168.1770502135.

The spelling of 4756639 in words is "four million, seven hundred fifty-six thousand, six hundred thirty-nine".