87371381 has 4 divisors (see below), whose sum is σ = 92510892. Its totient is φ = 82231872.

The previous prime is 87371357. The next prime is 87371387. The reversal of 87371381 is 18317378.

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 51251281 + 36120100 = 7159^2 + 6010^2 .

It is a cyclic number.

It is not a de Polignac number, because 87371381 - 2²² = 83177077 is a prime.

It is a super-2 number, since 2×87371381² = 15267516435694322, 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 (87371387) 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, 2569730 + ... + 2569763.

It is an arithmetic number, because the mean of its divisors is an integer number (23127723).

Almost surely, 2^87371381 is an apocalyptic number.

It is an amenable number.

87371381 is a deficient number, since it is larger than the sum of its proper divisors (5139511).

87371381 is a wasteful number, since it uses less digits than its factorization.

87371381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139510.

The product of its digits is 28224, while the sum is 38.

The square root of 87371381 is about 9347.2659639062. The cubic root of 87371381 is about 443.7343678683.

The spelling of 87371381 in words is "eighty-seven million, three hundred seventy-one thousand, three hundred eighty-one".