4631639 has 2 divisors, whose sum is σ = 4631640. Its totient is φ = 4631638.

The previous prime is 4631629. The next prime is 4631651. The reversal of 4631639 is 9361364.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4631639 - 2¹⁶ = 4566103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4631629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2315819 + 2315820.

It is an arithmetic number, because the mean of its divisors is an integer number (2315820).

Almost surely, 2^4631639 is an apocalyptic number.

4631639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4631639 is an equidigital number, since it uses as much as digits as its factorization.

4631639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 4631639 is about 2152.1242993842. The cubic root of 4631639 is about 166.6907756235.

It can be divided in two parts, 463 and 1639, that multiplied together give a palindrome (758857).

The spelling of 4631639 in words is "four million, six hundred thirty-one thousand, six hundred thirty-nine".