84719381 has 12 divisors (see below), whose sum is σ = 92378988. Its totient is φ = 77369472.

The previous prime is 84719359. The next prime is 84719389. The reversal of 84719381 is 18391748.

It can be written as a sum of positive squares in 2 ways, for example, as 71250481 + 13468900 = 8441^2 + 3670^2 .

It is a de Polignac number, because none of the positive numbers 2^k-84719381 is a prime.

It is a super-2 number, since 2×84719381² = 14354747034046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84719389) 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 11 ways as a sum of consecutive naturals, for example, 230660 + ... + 231026.

It is an arithmetic number, because the mean of its divisors is an integer number (7698249).

Almost surely, 2^84719381 is an apocalyptic number.

It is an amenable number.

84719381 is a deficient number, since it is larger than the sum of its proper divisors (7659607).

84719381 is an equidigital number, since it uses as much as digits as its factorization.

84719381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 421 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 84719381 is about 9204.3131737246. The cubic root of 84719381 is about 439.1985773198.

The spelling of 84719381 in words is "eighty-four million, seven hundred nineteen thousand, three hundred eighty-one".