100985439 has 16 divisors (see below), whose sum is σ = 138289760. Its totient is φ = 65525760.

The previous prime is 100985431. The next prime is 100985441. The reversal of 100985439 is 934589001.

It is not a de Polignac number, because 100985439 - 2³ = 100985431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100985397 and 100985406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100985431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14907 + ... + 20595.

It is an arithmetic number, because the mean of its divisors is an integer number (8643110).

Almost surely, 2^100985439 is an apocalyptic number.

100985439 is a deficient number, since it is larger than the sum of its proper divisors (37304321).

100985439 is an equidigital number, since it uses as much as digits as its factorization.

100985439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 100985439 is about 10049.1511581825. The cubic root of 100985439 is about 465.6785699307.

The spelling of 100985439 in words is "one hundred million, nine hundred eighty-five thousand, four hundred thirty-nine".