854216139 has 16 divisors (see below), whose sum is σ = 1303792128. Its totient is φ = 487324992.

The previous prime is 854216137. The next prime is 854216147. The reversal of 854216139 is 931612458.

It is not a de Polignac number, because 854216139 - 2¹ = 854216137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 854216097 and 854216106.

It is not an unprimeable number, because it can be changed into a prime (854216131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20007 + ... + 45920.

It is an arithmetic number, because the mean of its divisors is an integer number (81487008).

Almost surely, 2^854216139 is an apocalyptic number.

854216139 is a deficient number, since it is larger than the sum of its proper divisors (449575989).

854216139 is a wasteful number, since it uses less digits than its factorization.

854216139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66554.

The product of its digits is 51840, while the sum is 39.

The square root of 854216139 is about 29226.9762206082. The cubic root of 854216139 is about 948.8318565468.

The spelling of 854216139 in words is "eight hundred fifty-four million, two hundred sixteen thousand, one hundred thirty-nine".