4620640421 has 2 divisors, whose sum is σ = 4620640422. Its totient is φ = 4620640420.

The previous prime is 4620640403. The next prime is 4620640439. The reversal of 4620640421 is 1240460264.

It is a happy number.

4620640421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (4620640403) and next prime (4620640439).

It can be written as a sum of positive squares in only one way, i.e., 4075417921 + 545222500 = 63839^2 + 23350^2 .

It is a cyclic number.

It is not a de Polignac number, because 4620640421 - 2⁶ = 4620640357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4620640481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2310320210 + 2310320211.

It is an arithmetic number, because the mean of its divisors is an integer number (2310320211).

Almost surely, 2^4620640421 is an apocalyptic number.

It is an amenable number.

4620640421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4620640421 is an equidigital number, since it uses as much as digits as its factorization.

4620640421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 4620640421 is about 67975.2927246364. The cubic root of 4620640421 is about 1665.5872627143.

The spelling of 4620640421 in words is "four billion, six hundred twenty million, six hundred forty thousand, four hundred twenty-one".