87617443 has 4 divisors (see below), whose sum is σ = 89985520. Its totient is φ = 85249368.

The previous prime is 87617437. The next prime is 87617449. The reversal of 87617443 is 34471678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34471678 = 2 ⋅17235839.

It is an interprime number because it is at equal distance from previous prime (87617437) and next prime (87617449).

It is a cyclic number.

It is not a de Polignac number, because 87617443 - 2²¹ = 85520291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87617396 and 87617405.

It is not an unprimeable number, because it can be changed into a prime (87617449) 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, 1183983 + ... + 1184056.

It is an arithmetic number, because the mean of its divisors is an integer number (22496380).

Almost surely, 2^87617443 is an apocalyptic number.

87617443 is a deficient number, since it is larger than the sum of its proper divisors (2368077).

87617443 is a wasteful number, since it uses less digits than its factorization.

87617443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368076.

The product of its digits is 112896, while the sum is 40.

The square root of 87617443 is about 9360.4189542990. The cubic root of 87617443 is about 444.1505370431.

The spelling of 87617443 in words is "eighty-seven million, six hundred seventeen thousand, four hundred forty-three".