85069969 has 2 divisors, whose sum is σ = 85069970. Its totient is φ = 85069968.

The previous prime is 85069949. The next prime is 85069991. The reversal of 85069969 is 96996058.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82573569 + 2496400 = 9087^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 85069969 - 2¹³ = 85061777 is a prime.

It is a super-2 number, since 2×85069969² = 14473799251321922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85069949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42534984 + 42534985.

It is an arithmetic number, because the mean of its divisors is an integer number (42534985).

Almost surely, 2^85069969 is an apocalyptic number.

It is an amenable number.

85069969 is a deficient number, since it is larger than the sum of its proper divisors (1).

85069969 is an equidigital number, since it uses as much as digits as its factorization.

85069969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 85069969 is about 9223.3382785193. The cubic root of 85069969 is about 439.8035779612.

The spelling of 85069969 in words is "eighty-five million, sixty-nine thousand, nine hundred sixty-nine".