85673261 has 4 divisors (see below), whose sum is σ = 90182400. Its totient is φ = 81164124.

The previous prime is 85673257. The next prime is 85673267. The reversal of 85673261 is 16237658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16237658 = 2 ⋅8118829.

It is not a de Polignac number, because 85673261 - 2² = 85673257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85673267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254541 + ... + 2254578.

It is an arithmetic number, because the mean of its divisors is an integer number (22545600).

Almost surely, 2^85673261 is an apocalyptic number.

It is an amenable number.

85673261 is a deficient number, since it is larger than the sum of its proper divisors (4509139).

85673261 is a wasteful number, since it uses less digits than its factorization.

85673261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509138.

The product of its digits is 60480, while the sum is 38.

The square root of 85673261 is about 9255.9851447590. The cubic root of 85673261 is about 440.8407838748.

The spelling of 85673261 in words is "eighty-five million, six hundred seventy-three thousand, two hundred sixty-one".