87887291 has 2 divisors, whose sum is σ = 87887292. Its totient is φ = 87887290.

The previous prime is 87887273. The next prime is 87887329. The reversal of 87887291 is 19278878.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87887291 is a prime.

It is not a weakly prime, because it can be changed into another prime (87887251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43943645 + 43943646.

It is an arithmetic number, because the mean of its divisors is an integer number (43943646).

Almost surely, 2^87887291 is an apocalyptic number.

87887291 is a deficient number, since it is larger than the sum of its proper divisors (1).

87887291 is an equidigital number, since it uses as much as digits as its factorization.

87887291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 50.

The square root of 87887291 is about 9374.8221849804. The cubic root of 87887291 is about 444.6060410964.

The spelling of 87887291 in words is "eighty-seven million, eight hundred eighty-seven thousand, two hundred ninety-one".