87983717 has 4 divisors (see below), whose sum is σ = 91809120. Its totient is φ = 84158316.

The previous prime is 87983711. The next prime is 87983723. The reversal of 87983717 is 71738978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (87983711) and next prime (87983723).

It is a cyclic number.

It is not a de Polignac number, because 87983717 - 2¹⁸ = 87721573 is a prime.

It is a super-2 number, since 2×87983717² = 15482268914272178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87983711) 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, 1912667 + ... + 1912712.

It is an arithmetic number, because the mean of its divisors is an integer number (22952280).

Almost surely, 2^87983717 is an apocalyptic number.

It is an amenable number.

87983717 is a deficient number, since it is larger than the sum of its proper divisors (3825403).

87983717 is a wasteful number, since it uses less digits than its factorization.

87983717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825402.

The product of its digits is 592704, while the sum is 50.

The square root of 87983717 is about 9379.9635926799. The cubic root of 87983717 is about 444.7685822793.

The spelling of 87983717 in words is "eighty-seven million, nine hundred eighty-three thousand, seven hundred seventeen".