87751477 has 8 divisors (see below), whose sum is σ = 99030240. Its totient is φ = 77022960.

The previous prime is 87751471. The next prime is 87751487. The reversal of 87751477 is 77415778.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87751477 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 (87751471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137223 + ... + 137860.

It is an arithmetic number, because the mean of its divisors is an integer number (12378780).

Almost surely, 2^87751477 is an apocalyptic number.

It is an amenable number.

87751477 is a deficient number, since it is larger than the sum of its proper divisors (11278763).

87751477 is a wasteful number, since it uses less digits than its factorization.

87751477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275123.

The product of its digits is 384160, while the sum is 46.

The square root of 87751477 is about 9367.5758336936. The cubic root of 87751477 is about 444.3769034703.

The spelling of 87751477 in words is "eighty-seven million, seven hundred fifty-one thousand, four hundred seventy-seven".