9487636621 has 2 divisors, whose sum is σ = 9487636622.
Its totient is φ = 9487636620.
The previous prime is 9487636603. The next prime is 9487636673. The reversal of 9487636621 is 1266367849.
It is an a-pointer prime, because the next prime (9487636673) can be obtained adding 9487636621 to its sum of digits (52).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 8683630596 + 804006025 = 93186^2 + 28355^2
It is a cyclic number.
It is not a de Polignac number, because 9487636621 - 25 = 9487636589 is a prime.
It is the 97405-th Hogben number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9487636721) by changing a digit.
It is a nontrivial repunit in base 97404.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4743818310 + 4743818311.
It is an arithmetic number, because the mean of its divisors is an integer number (4743818311).
Almost surely, 29487636621 is an apocalyptic number.
It is an amenable number.
9487636621 is a deficient number, since it is larger than the sum of its proper divisors (1).
9487636621 is an equidigital number, since it uses as much as digits as its factorization.
9487636621 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2612736, while the sum is 52.
The square root of 9487636621 is about 97404.5000038499.
The cubic root of 9487636621 is about 2116.9926372740.
The spelling of 9487636621 in words is "nine billion, four hundred eighty-seven million, six hundred thirty-six thousand, six hundred twenty-one".