981854439 has 16 divisors (see below), whose sum is σ = 1320748800. Its totient is φ = 648781056.

The previous prime is 981854437. The next prime is 981854441. The reversal of 981854439 is 934458189.

It is an interprime number because it is at equal distance from previous prime (981854437) and next prime (981854441).

It is not a de Polignac number, because 981854439 - 2¹ = 981854437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981854391 and 981854400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981854437) 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, 308247 + ... + 311415.

It is an arithmetic number, because the mean of its divisors is an integer number (82546800).

Almost surely, 2^981854439 is an apocalyptic number.

981854439 is a deficient number, since it is larger than the sum of its proper divisors (338894361).

981854439 is a wasteful number, since it uses less digits than its factorization.

981854439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054.

The product of its digits is 1244160, while the sum is 51.

The square root of 981854439 is about 31334.5566268297. The cubic root of 981854439 is about 993.9145217423.

The spelling of 981854439 in words is "nine hundred eighty-one million, eight hundred fifty-four thousand, four hundred thirty-nine".