83616487 has 4 divisors (see below), whose sum is σ = 84794256. Its totient is φ = 82438720.

The previous prime is 83616451. The next prime is 83616499. The reversal of 83616487 is 78461638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78461638 = 2 ⋅39230819.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83616487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83616427) 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, 588778 + ... + 588919.

It is an arithmetic number, because the mean of its divisors is an integer number (21198564).

Almost surely, 2^83616487 is an apocalyptic number.

83616487 is a deficient number, since it is larger than the sum of its proper divisors (1177769).

83616487 is a wasteful number, since it uses less digits than its factorization.

83616487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177768.

The product of its digits is 193536, while the sum is 43.

The square root of 83616487 is about 9144.2051048738. The cubic root of 83616487 is about 437.2843881254.

The spelling of 83616487 in words is "eighty-three million, six hundred sixteen thousand, four hundred eighty-seven".