7085885621 has 2 divisors, whose sum is σ = 7085885622. Its totient is φ = 7085885620.

The previous prime is 7085885603. The next prime is 7085885647. The reversal of 7085885621 is 1265885807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5976063025 + 1109822596 = 77305^2 + 33314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7085885621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7085885621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7085885021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3542942810 + 3542942811.

It is an arithmetic number, because the mean of its divisors is an integer number (3542942811).

Almost surely, 2^7085885621 is an apocalyptic number.

It is an amenable number.

7085885621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7085885621 is an equidigital number, since it uses as much as digits as its factorization.

7085885621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1075200, while the sum is 50.

The square root of 7085885621 is about 84177.7026355555. The cubic root of 7085885621 is about 1920.7228923069.

The spelling of 7085885621 in words is "seven billion, eighty-five million, eight hundred eighty-five thousand, six hundred twenty-one".