87575381 has 6 divisors (see below), whose sum is σ = 93030210. Its totient is φ = 82423616.

The previous prime is 87575357. The next prime is 87575387. The reversal of 87575381 is 18357578.

It can be written as a sum of positive squares in 3 ways, for example, as 65060356 + 22515025 = 8066^2 + 4745^2 .

It is not a de Polignac number, because 87575381 - 2⁶ = 87575317 is a prime.

It is a super-2 number, since 2×87575381² = 15338894714590322, 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 (87575387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151226 + ... + 151803.

It is an arithmetic number, because the mean of its divisors is an integer number (15505035).

Almost surely, 2^87575381 is an apocalyptic number.

It is an amenable number.

87575381 is a deficient number, since it is larger than the sum of its proper divisors (5454829).

87575381 is a wasteful number, since it uses less digits than its factorization.

87575381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303063 (or 303046 counting only the distinct ones).

The product of its digits is 235200, while the sum is 44.

The square root of 87575381 is about 9358.1718834396. The cubic root of 87575381 is about 444.0794520721.

The spelling of 87575381 in words is "eighty-seven million, five hundred seventy-five thousand, three hundred eighty-one".