4688620639 has 2 divisors, whose sum is σ = 4688620640. Its totient is φ = 4688620638.

The previous prime is 4688620631. The next prime is 4688620663. The reversal of 4688620639 is 9360268864.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4688620639 - 2³ = 4688620631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4688620631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2344310319 + 2344310320.

It is an arithmetic number, because the mean of its divisors is an integer number (2344310320).

Almost surely, 2^4688620639 is an apocalyptic number.

4688620639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4688620639 is an equidigital number, since it uses as much as digits as its factorization.

4688620639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 4688620639 is about 68473.5031891899. The cubic root of 4688620639 is about 1673.7157321649.

The spelling of 4688620639 in words is "four billion, six hundred eighty-eight million, six hundred twenty thousand, six hundred thirty-nine".