84311387 has 4 divisors (see below), whose sum is σ = 84334416. Its totient is φ = 84288360.

The previous prime is 84311369. The next prime is 84311443. The reversal of 84311387 is 78311348.

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 84311387 - 2¹⁸ = 84049243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84301387) 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, 4664 + ... + 13797.

It is an arithmetic number, because the mean of its divisors is an integer number (21083604).

Almost surely, 2^84311387 is an apocalyptic number.

84311387 is a deficient number, since it is larger than the sum of its proper divisors (23029).

84311387 is a wasteful number, since it uses less digits than its factorization.

84311387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23028.

The product of its digits is 16128, while the sum is 35.

The square root of 84311387 is about 9182.1232294061. The cubic root of 84311387 is about 438.4924075141.

The spelling of 84311387 in words is "eighty-four million, three hundred eleven thousand, three hundred eighty-seven".