87381274 has 4 divisors (see below), whose sum is σ = 131071914. Its totient is φ = 43690636.

The previous prime is 87381253. The next prime is 87381293. The reversal of 87381274 is 47218378.

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

It can be written as a sum of positive squares in only one way, i.e., 75082225 + 12299049 = 8665^2 + 3507^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21845317 + ... + 21845320.

Almost surely, 2^87381274 is an apocalyptic number.

87381274 is a deficient number, since it is larger than the sum of its proper divisors (43690640).

87381274 is a wasteful number, since it uses less digits than its factorization.

87381274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43690639.

The product of its digits is 75264, while the sum is 40.

The square root of 87381274 is about 9347.7951411015. The cubic root of 87381274 is about 443.7511151463.

The spelling of 87381274 in words is "eighty-seven million, three hundred eighty-one thousand, two hundred seventy-four".