85556969 has 2 divisors, whose sum is σ = 85556970. Its totient is φ = 85556968.

The previous prime is 85556951. The next prime is 85557013. The reversal of 85556969 is 96965558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 38291344 = 6875^2 + 6188^2 .

It is a cyclic number.

It is not a de Polignac number, because 85556969 - 2¹⁶ = 85491433 is a prime.

It is a super-2 number, since 2×85556969² = 14639989888933922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85556969.

It is not a weakly prime, because it can be changed into another prime (85558969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778484 + 42778485.

It is an arithmetic number, because the mean of its divisors is an integer number (42778485).

Almost surely, 2^85556969 is an apocalyptic number.

It is an amenable number.

85556969 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556969 is an equidigital number, since it uses as much as digits as its factorization.

85556969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 53.

The square root of 85556969 is about 9249.7010221953. The cubic root of 85556969 is about 440.6412293135.

The spelling of 85556969 in words is "eighty-five million, five hundred fifty-six thousand, nine hundred sixty-nine".