87671517 has 4 divisors (see below), whose sum is σ = 116895360. Its totient is φ = 58447676.

The previous prime is 87671477. The next prime is 87671531. The reversal of 87671517 is 71517678.

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 a cyclic number.

It is not a de Polignac number, because 87671517 - 2²² = 83477213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87671557) 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, 14611917 + ... + 14611922.

It is an arithmetic number, because the mean of its divisors is an integer number (29223840).

Almost surely, 2^87671517 is an apocalyptic number.

It is an amenable number.

87671517 is a deficient number, since it is larger than the sum of its proper divisors (29223843).

87671517 is a wasteful number, since it uses less digits than its factorization.

87671517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29223842.

The product of its digits is 82320, while the sum is 42.

The square root of 87671517 is about 9363.3069478684. The cubic root of 87671517 is about 444.2418889332.

It can be divided in two parts, 87671 and 517, that added together give a palindrome (88188).

The spelling of 87671517 in words is "eighty-seven million, six hundred seventy-one thousand, five hundred seventeen".