85240877 has 2 divisors, whose sum is σ = 85240878. Its totient is φ = 85240876.

The previous prime is 85240871. The next prime is 85240879. The reversal of 85240877 is 77804258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85119076 + 121801 = 9226^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 85240877 - 2⁴ = 85240861 is a prime.

It is a super-2 number, since 2×85240877² = 14532014223458258, which contains 22 as substring.

Together with 85240879, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4956845 and since 85240877 and 4956845 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85240871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42620438 + 42620439.

It is an arithmetic number, because the mean of its divisors is an integer number (42620439).

Almost surely, 2^85240877 is an apocalyptic number.

It is an amenable number.

85240877 is a deficient number, since it is larger than the sum of its proper divisors (1).

85240877 is an equidigital number, since it uses as much as digits as its factorization.

85240877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 85240877 is about 9232.5986049432. The cubic root of 85240877 is about 440.0979069316.

The spelling of 85240877 in words is "eighty-five million, two hundred forty thousand, eight hundred seventy-seven".