10981639 has 4 divisors (see below), whose sum is σ = 11559640. Its totient is φ = 10403640.

The previous prime is 10981627. The next prime is 10981651. The reversal of 10981639 is 93618901.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10981627) and next prime (10981651).

It is not a de Polignac number, because 10981639 - 2¹³ = 10973447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10981598 and 10981607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10981669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288972 + ... + 289009.

It is an arithmetic number, because the mean of its divisors is an integer number (2889910).

Almost surely, 2^10981639 is an apocalyptic number.

10981639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10981639 is a deficient number, since it is larger than the sum of its proper divisors (578001).

10981639 is an equidigital number, since it uses as much as digits as its factorization.

10981639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578000.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 10981639 is about 3313.8556094073. The cubic root of 10981639 is about 222.2741992400.

It can be divided in two parts, 109816 and 39, that multiplied together give a palindrome (4282824).

The spelling of 10981639 in words is "ten million, nine hundred eighty-one thousand, six hundred thirty-nine".