85143937 has 4 divisors (see below), whose sum is σ = 85196800. Its totient is φ = 85091076.

The previous prime is 85143923. The next prime is 85143943. The reversal of 85143937 is 73934158.

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.

It is a cyclic number.

It is not a de Polignac number, because 85143937 - 2⁷ = 85143809 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 85143937.

It is not an unprimeable number, because it can be changed into a prime (85143967) 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, 23937 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (21299200).

Almost surely, 2^85143937 is an apocalyptic number.

It is an amenable number.

85143937 is a deficient number, since it is larger than the sum of its proper divisors (52863).

85143937 is a wasteful number, since it uses less digits than its factorization.

85143937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52862.

The product of its digits is 90720, while the sum is 40.

The square root of 85143937 is about 9227.3472352567. The cubic root of 85143937 is about 439.9310101888.

The spelling of 85143937 in words is "eighty-five million, one hundred forty-three thousand, nine hundred thirty-seven".