87049987 has 4 divisors (see below), whose sum is σ = 87584200. Its totient is φ = 86515776.

The previous prime is 87049973. The next prime is 87049993. The reversal of 87049987 is 78994078.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78994078 = 2 ⋅39497039.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87049987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87049927) 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, 266862 + ... + 267187.

It is an arithmetic number, because the mean of its divisors is an integer number (21896050).

Almost surely, 2^87049987 is an apocalyptic number.

87049987 is a deficient number, since it is larger than the sum of its proper divisors (534213).

87049987 is a wasteful number, since it uses less digits than its factorization.

87049987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534212.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 87049987 is about 9330.0582527656. The cubic root of 87049987 is about 443.1896098207.

The spelling of 87049987 in words is "eighty-seven million, forty-nine thousand, nine hundred eighty-seven".