85921911 has 8 divisors (see below), whose sum is σ = 127291760. Its totient is φ = 57281256.

The previous prime is 85921909. The next prime is 85921919. The reversal of 85921911 is 11912958.

It is not a de Polignac number, because 85921911 - 2¹ = 85921909 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 (85921919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591120 + ... + 1591173.

It is an arithmetic number, because the mean of its divisors is an integer number (15911470).

Almost surely, 2^85921911 is an apocalyptic number.

85921911 is a deficient number, since it is larger than the sum of its proper divisors (41369849).

85921911 is a wasteful number, since it uses less digits than its factorization.

85921911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182302 (or 3182296 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 85921911 is about 9269.4072626031. The cubic root of 85921911 is about 441.2668568596.

The spelling of 85921911 in words is "eighty-five million, nine hundred twenty-one thousand, nine hundred eleven".