8439381 has 6 divisors (see below), whose sum is σ = 12190230. Its totient is φ = 5626248.

The previous prime is 8439341. The next prime is 8439383. The reversal of 8439381 is 1839348.

It can be written as a sum of positive squares in only one way, i.e., 5716881 + 2722500 = 2391^2 + 1650^2 .

It is not a de Polignac number, because 8439381 - 2¹⁹ = 7915093 is a prime.

It is a super-2 number, since 2×8439381² = 142446303326322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 468846 + ... + 468863.

It is an arithmetic number, because the mean of its divisors is an integer number (2031705).

Almost surely, 2^8439381 is an apocalyptic number.

It is an amenable number.

8439381 is a deficient number, since it is larger than the sum of its proper divisors (3750849).

8439381 is a wasteful number, since it uses less digits than its factorization.

8439381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937715 (or 937712 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8439381 is about 2905.0612730199. The cubic root of 8439381 is about 203.5964484747.

The spelling of 8439381 in words is "eight million, four hundred thirty-nine thousand, three hundred eighty-one".