87406543 has 18 divisors (see below), whose sum is σ = 104579496. Its totient is φ = 72839088.

The previous prime is 87406523. The next prime is 87406559. The reversal of 87406543 is 34560478.

It is not a de Polignac number, because 87406543 - 2⁹ = 87406031 is a prime.

It is a super-3 number, since 3×87406543³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87406513) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66430 + ... + 67732.

It is an arithmetic number, because the mean of its divisors is an integer number (5809972).

Almost surely, 2^87406543 is an apocalyptic number.

87406543 is a deficient number, since it is larger than the sum of its proper divisors (17172953).

87406543 is a wasteful number, since it uses less digits than its factorization.

87406543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1347 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 87406543 is about 9349.1466455501. The cubic root of 87406543 is about 443.7938858137.

The spelling of 87406543 in words is "eighty-seven million, four hundred six thousand, five hundred forty-three".