85937395921 has 4 divisors (see below), whose sum is σ = 92547964852. Its totient is φ = 79326826992.

The previous prime is 85937395883. The next prime is 85937395939. The reversal of 85937395921 is 12959373958.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40517261521 + 45420134400 = 201289^2 + 213120^2 .

It is a cyclic number.

It is not a de Polignac number, because 85937395921 - 2¹⁹ = 85936871633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85937395921.

It is not an unprimeable number, because it can be changed into a prime (85937395961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3305284446 + ... + 3305284471.

It is an arithmetic number, because the mean of its divisors is an integer number (23136991213).

Almost surely, 2^85937395921 is an apocalyptic number.

It is an amenable number.

85937395921 is a deficient number, since it is larger than the sum of its proper divisors (6610568931).

85937395921 is a wasteful number, since it uses less digits than its factorization.

85937395921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610568930.

The product of its digits is 18370800, while the sum is 61.

The spelling of 85937395921 in words is "eighty-five billion, nine hundred thirty-seven million, three hundred ninety-five thousand, nine hundred twenty-one".