87258643 has 4 divisors (see below), whose sum is σ = 87426648. Its totient is φ = 87090640.

The previous prime is 87258641. The next prime is 87258673. The reversal of 87258643 is 34685278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34685278 = 2 ⋅17342639.

It is a cyclic number.

It is not a de Polignac number, because 87258643 - 2¹ = 87258641 is a prime.

It is a super-2 number, since 2×87258643² = 15228141556402898, which contains 22 as substring.

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 87258643.

It is not an unprimeable number, because it can be changed into a prime (87258641) 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, 83221 + ... + 84262.

It is an arithmetic number, because the mean of its divisors is an integer number (21856662).

Almost surely, 2^87258643 is an apocalyptic number.

87258643 is a deficient number, since it is larger than the sum of its proper divisors (168005).

87258643 is a wasteful number, since it uses less digits than its factorization.

87258643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168004.

The product of its digits is 322560, while the sum is 43.

The square root of 87258643 is about 9341.2334838607. The cubic root of 87258643 is about 443.5434309863.

The spelling of 87258643 in words is "eighty-seven million, two hundred fifty-eight thousand, six hundred forty-three".