85620797 has 2 divisors, whose sum is σ = 85620798. Its totient is φ = 85620796.

The previous prime is 85620781. The next prime is 85620809. The reversal of 85620797 is 79702658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76983076 + 8637721 = 8774^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 85620797 - 2⁴ = 85620781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85620757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42810398 + 42810399.

It is an arithmetic number, because the mean of its divisors is an integer number (42810399).

Almost surely, 2^85620797 is an apocalyptic number.

It is an amenable number.

85620797 is a deficient number, since it is larger than the sum of its proper divisors (1).

85620797 is an equidigital number, since it uses as much as digits as its factorization.

85620797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 85620797 is about 9253.1506526156. The cubic root of 85620797 is about 440.7507791551.

The spelling of 85620797 in words is "eighty-five million, six hundred twenty thousand, seven hundred ninety-seven".