84691387 has 8 divisors (see below), whose sum is σ = 92508480. Its totient is φ = 76893960.

The previous prime is 84691367. The next prime is 84691393. The reversal of 84691387 is 78319648.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-84691387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84691337) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4968 + ... + 13930.

It is an arithmetic number, because the mean of its divisors is an integer number (11563560).

Almost surely, 2^84691387 is an apocalyptic number.

84691387 is a deficient number, since it is larger than the sum of its proper divisors (7817093).

84691387 is a wasteful number, since it uses less digits than its factorization.

84691387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9833.

The product of its digits is 290304, while the sum is 46.

The square root of 84691387 is about 9202.7923479779. The cubic root of 84691387 is about 439.1501968930.

It can be divided in two parts, 84691 and 387, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 84691387 in words is "eighty-four million, six hundred ninety-one thousand, three hundred eighty-seven".