85344977 has 4 divisors (see below), whose sum is σ = 87651636. Its totient is φ = 83038320.

The previous prime is 85344971. The next prime is 85344983. The reversal of 85344977 is 77944358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77944358 = 2 ⋅38972179.

It is an interprime number because it is at equal distance from previous prime (85344971) and next prime (85344983).

It can be written as a sum of positive squares in 2 ways, for example, as 55413136 + 29931841 = 7444^2 + 5471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85344977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85344971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153274 + ... + 1153347.

It is an arithmetic number, because the mean of its divisors is an integer number (21912909).

Almost surely, 2^85344977 is an apocalyptic number.

It is an amenable number.

85344977 is a deficient number, since it is larger than the sum of its proper divisors (2306659).

85344977 is a wasteful number, since it uses less digits than its factorization.

85344977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306658.

The product of its digits is 846720, while the sum is 47.

The square root of 85344977 is about 9238.2345174822. The cubic root of 85344977 is about 440.2769898483.

The spelling of 85344977 in words is "eighty-five million, three hundred forty-four thousand, nine hundred seventy-seven".