86557437 has 16 divisors (see below), whose sum is σ = 131362560. Its totient is φ = 56296800.

The previous prime is 86557433. The next prime is 86557451. The reversal of 86557437 is 73475568.

It is not a de Polignac number, because 86557437 - 2² = 86557433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86557392 and 86557401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86557433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37989 + ... + 40202.

It is an arithmetic number, because the mean of its divisors is an integer number (8210160).

Almost surely, 2^86557437 is an apocalyptic number.

It is an amenable number.

86557437 is a deficient number, since it is larger than the sum of its proper divisors (44805123).

86557437 is a wasteful number, since it uses less digits than its factorization.

86557437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78241 (or 78235 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 86557437 is about 9303.6249387000. The cubic root of 86557437 is about 442.3521367498.

The spelling of 86557437 in words is "eighty-six million, five hundred fifty-seven thousand, four hundred thirty-seven".