87475517 has 4 divisors (see below), whose sum is σ = 87933696. Its totient is φ = 87017340.

The previous prime is 87475501. The next prime is 87475537. The reversal of 87475517 is 71557478.

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 87475517 - 2⁴ = 87475501 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 (87475537) 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, 228803 + ... + 229184.

It is an arithmetic number, because the mean of its divisors is an integer number (21983424).

Almost surely, 2^87475517 is an apocalyptic number.

It is an amenable number.

87475517 is a deficient number, since it is larger than the sum of its proper divisors (458179).

87475517 is a wasteful number, since it uses less digits than its factorization.

87475517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458178.

The product of its digits is 274400, while the sum is 44.

The square root of 87475517 is about 9352.8347039815. The cubic root of 87475517 is about 443.9105902398.

The spelling of 87475517 in words is "eighty-seven million, four hundred seventy-five thousand, five hundred seventeen".