85642437 has 4 divisors (see below), whose sum is σ = 114189920. Its totient is φ = 57094956.

The previous prime is 85642433. The next prime is 85642441. The reversal of 85642437 is 73424658.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (85642433) and next prime (85642441).

It is not a de Polignac number, because 85642437 - 2² = 85642433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85642395 and 85642404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85642433) 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, 14273737 + ... + 14273742.

It is an arithmetic number, because the mean of its divisors is an integer number (28547480).

Almost surely, 2^85642437 is an apocalyptic number.

It is an amenable number.

85642437 is a deficient number, since it is larger than the sum of its proper divisors (28547483).

85642437 is a wasteful number, since it uses less digits than its factorization.

85642437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28547482.

The product of its digits is 161280, while the sum is 39.

The square root of 85642437 is about 9254.3199101825. The cubic root of 85642437 is about 440.7879081540.

The spelling of 85642437 in words is "eighty-five million, six hundred forty-two thousand, four hundred thirty-seven".