84266987 has 4 divisors (see below), whose sum is σ = 96305136. Its totient is φ = 72228840.

The previous prime is 84266981. The next prime is 84267037. The reversal of 84266987 is 78966248.

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 84266987 - 2⁸ = 84266731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84266981) 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, 6019064 + ... + 6019077.

It is an arithmetic number, because the mean of its divisors is an integer number (24076284).

Almost surely, 2^84266987 is an apocalyptic number.

84266987 is a deficient number, since it is larger than the sum of its proper divisors (12038149).

84266987 is a wasteful number, since it uses less digits than its factorization.

84266987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12038148.

The product of its digits is 1161216, while the sum is 50.

The square root of 84266987 is about 9179.7051695575. The cubic root of 84266987 is about 438.4154211497.

The spelling of 84266987 in words is "eighty-four million, two hundred sixty-six thousand, nine hundred eighty-seven".