4787311621 has 2 divisors, whose sum is σ = 4787311622. Its totient is φ = 4787311620.

The previous prime is 4787311597. The next prime is 4787311663. The reversal of 4787311621 is 1261137874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3808247521 + 979064100 = 61711^2 + 31290^2 .

It is a cyclic number.

It is not a de Polignac number, because 4787311621 - 2¹³ = 4787303429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4787311681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2393655810 + 2393655811.

It is an arithmetic number, because the mean of its divisors is an integer number (2393655811).

Almost surely, 2^4787311621 is an apocalyptic number.

It is an amenable number.

4787311621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4787311621 is an equidigital number, since it uses as much as digits as its factorization.

4787311621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 4787311621 is about 69190.4012201114. The cubic root of 4787311621 is about 1685.3776588061.

The spelling of 4787311621 in words is "four billion, seven hundred eighty-seven million, three hundred eleven thousand, six hundred twenty-one".