87574381 has 4 divisors (see below), whose sum is σ = 87890812. Its totient is φ = 87257952.

The previous prime is 87574367. The next prime is 87574387. The reversal of 87574381 is 18347578.

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 45765225 + 41809156 = 6765^2 + 6466^2 .

It is a cyclic number.

It is not a de Polignac number, because 87574381 - 2²³ = 79185773 is a prime.

It is a super-2 number, since 2×87574381² = 15338544415066322, 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 (87574387) 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, 157800 + ... + 158353.

It is an arithmetic number, because the mean of its divisors is an integer number (21972703).

Almost surely, 2^87574381 is an apocalyptic number.

It is an amenable number.

87574381 is a deficient number, since it is larger than the sum of its proper divisors (316431).

87574381 is a wasteful number, since it uses less digits than its factorization.

87574381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316430.

The product of its digits is 188160, while the sum is 43.

The square root of 87574381 is about 9358.1184540483. The cubic root of 87574381 is about 444.0777617906.

The spelling of 87574381 in words is "eighty-seven million, five hundred seventy-four thousand, three hundred eighty-one".