85311297 has 12 divisors (see below), whose sum is σ = 123307860. Its totient is φ = 56837088.

The previous prime is 85311263. The next prime is 85311299. The reversal of 85311297 is 79211358.

It can be written as a sum of positive squares in 2 ways, for example, as 75064896 + 10246401 = 8664^2 + 3201^2 .

It is not a de Polignac number, because 85311297 - 2⁷ = 85311169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85311299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23479 + ... + 26867.

It is an arithmetic number, because the mean of its divisors is an integer number (10275655).

Almost surely, 2^85311297 is an apocalyptic number.

It is an amenable number.

85311297 is a deficient number, since it is larger than the sum of its proper divisors (37996563).

85311297 is a wasteful number, since it uses less digits than its factorization.

85311297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192 (or 6189 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 85311297 is about 9236.4114784910. The cubic root of 85311297 is about 440.2190661892.

The spelling of 85311297 in words is "eighty-five million, three hundred eleven thousand, two hundred ninety-seven".