87891134 has 8 divisors (see below), whose sum is σ = 133505760. Its totient is φ = 43389216.

The previous prime is 87891121. The next prime is 87891143. The reversal of 87891134 is 43119878.

87891134 = T₁₄₅₂ + T₁₄₅₃ + ... + T₁₅₃₀.

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

It is a junction number, because it is equal to n+sod(n) for n = 87891091 and 87891100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277979 + ... + 278294.

It is an arithmetic number, because the mean of its divisors is an integer number (16688220).

Almost surely, 2^87891134 is an apocalyptic number.

87891134 is a deficient number, since it is larger than the sum of its proper divisors (45614626).

87891134 is a wasteful number, since it uses less digits than its factorization.

87891134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556354.

The product of its digits is 48384, while the sum is 41.

The square root of 87891134 is about 9375.0271466274. The cubic root of 87891134 is about 444.6125213511.

The spelling of 87891134 in words is "eighty-seven million, eight hundred ninety-one thousand, one hundred thirty-four".