87880417 has 4 divisors (see below), whose sum is σ = 88207380. Its totient is φ = 87553456.

The previous prime is 87880399. The next prime is 87880421. The reversal of 87880417 is 71408878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25644096 + 62236321 = 5064^2 + 7889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87880417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87880477) 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, 163078 + ... + 163615.

It is an arithmetic number, because the mean of its divisors is an integer number (22051845).

Almost surely, 2^87880417 is an apocalyptic number.

It is an amenable number.

87880417 is a deficient number, since it is larger than the sum of its proper divisors (326963).

87880417 is a wasteful number, since it uses less digits than its factorization.

87880417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326962.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 87880417 is about 9374.4555575244. The cubic root of 87880417 is about 444.5944493498.

The spelling of 87880417 in words is "eighty-seven million, eight hundred eighty thousand, four hundred seventeen".