85880621 has 2 divisors, whose sum is σ = 85880622. Its totient is φ = 85880620.

The previous prime is 85880611. The next prime is 85880647. The reversal of 85880621 is 12608858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 16491721 = 8330^2 + 4061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85880621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85880611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42940310 + 42940311.

It is an arithmetic number, because the mean of its divisors is an integer number (42940311).

Almost surely, 2^85880621 is an apocalyptic number.

It is an amenable number.

85880621 is a deficient number, since it is larger than the sum of its proper divisors (1).

85880621 is an equidigital number, since it uses as much as digits as its factorization.

85880621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 85880621 is about 9267.1797759620. The cubic root of 85880621 is about 441.1961615518.

The spelling of 85880621 in words is "eighty-five million, eight hundred eighty thousand, six hundred twenty-one".