87196643 has 4 divisors (see below), whose sum is σ = 91785960. Its totient is φ = 82607328.

The previous prime is 87196639. The next prime is 87196651. The reversal of 87196643 is 34669178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34669178 = 2 ⋅17334589.

It is a cyclic number.

It is not a de Polignac number, because 87196643 - 2² = 87196639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87196594 and 87196603.

It is not an unprimeable number, because it can be changed into a prime (87196693) 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, 2294630 + ... + 2294667.

It is an arithmetic number, because the mean of its divisors is an integer number (22946490).

Almost surely, 2^87196643 is an apocalyptic number.

87196643 is a deficient number, since it is larger than the sum of its proper divisors (4589317).

87196643 is a wasteful number, since it uses less digits than its factorization.

87196643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589316.

The product of its digits is 217728, while the sum is 44.

The square root of 87196643 is about 9337.9142746119. The cubic root of 87196643 is about 443.4383555941.

The spelling of 87196643 in words is "eighty-seven million, one hundred ninety-six thousand, six hundred forty-three".