87474131 has 4 divisors (see below), whose sum is σ = 87504600. Its totient is φ = 87443664.

The previous prime is 87474109. The next prime is 87474137. The reversal of 87474131 is 13147478.

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

It is a cyclic number.

It is not a de Polignac number, because 87474131 - 2⁶ = 87474067 is a prime.

It is a super-2 number, since 2×87474131² = 15303447188410322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87474091 and 87474100.

It is not an unprimeable number, because it can be changed into a prime (87474137) 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, 10421 + ... + 16838.

It is an arithmetic number, because the mean of its divisors is an integer number (21876150).

Almost surely, 2^87474131 is an apocalyptic number.

87474131 is a deficient number, since it is larger than the sum of its proper divisors (30469).

87474131 is a wasteful number, since it uses less digits than its factorization.

87474131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30468.

The product of its digits is 18816, while the sum is 35.

The square root of 87474131 is about 9352.7606085048. The cubic root of 87474131 is about 443.9082457235.

The spelling of 87474131 in words is "eighty-seven million, four hundred seventy-four thousand, one hundred thirty-one".