87986291 has 4 divisors (see below), whose sum is σ = 88005432. Its totient is φ = 87967152.

The previous prime is 87986279. The next prime is 87986317. The reversal of 87986291 is 19268978.

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 87986291 - 2¹⁴ = 87969907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87986231) 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, 1940 + ... + 13406.

It is an arithmetic number, because the mean of its divisors is an integer number (22001358).

Almost surely, 2^87986291 is an apocalyptic number.

87986291 is a deficient number, since it is larger than the sum of its proper divisors (19141).

87986291 is a wasteful number, since it uses less digits than its factorization.

87986291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19140.

The product of its digits is 435456, while the sum is 50.

The square root of 87986291 is about 9380.1007990320. The cubic root of 87986291 is about 444.7729195333.

The spelling of 87986291 in words is "eighty-seven million, nine hundred eighty-six thousand, two hundred ninety-one".