85136437 has 4 divisors (see below), whose sum is σ = 85154976. Its totient is φ = 85117900.

The previous prime is 85136423. The next prime is 85136453. The reversal of 85136437 is 73463158.

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 a de Polignac number, because none of the positive numbers 2^k-85136437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85136396 and 85136405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85136407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312 + ... + 13462.

It is an arithmetic number, because the mean of its divisors is an integer number (21288744).

Almost surely, 2^85136437 is an apocalyptic number.

It is an amenable number.

85136437 is a deficient number, since it is larger than the sum of its proper divisors (18539).

85136437 is a wasteful number, since it uses less digits than its factorization.

85136437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18538.

The product of its digits is 60480, while the sum is 37.

The square root of 85136437 is about 9226.9408256475. The cubic root of 85136437 is about 439.9180925360.

The spelling of 85136437 in words is "eighty-five million, one hundred thirty-six thousand, four hundred thirty-seven".