8409139604 has 12 divisors (see below), whose sum is σ = 14748772500. Its totient is φ = 4195204608.

The previous prime is 8409139603. The next prime is 8409139621. The reversal of 8409139604 is 4069319048.

It can be written as a sum of positive squares in 2 ways, for example, as 2232751504 + 6176388100 = 47252^2 + 78590^2 .

It is a super-2 number, since 2×8409139604² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409139601) 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 3 ways as a sum of consecutive naturals, for example, 2339279 + ... + 2342870.

It is an arithmetic number, because the mean of its divisors is an integer number (1229064375).

Almost surely, 2^8409139604 is an apocalyptic number.

It is an amenable number.

8409139604 is a deficient number, since it is larger than the sum of its proper divisors (6339632896).

8409139604 is a wasteful number, since it uses less digits than its factorization.

8409139604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682602 (or 4682600 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 8409139604 is about 91701.3609713618. The cubic root of 8409139604 is about 2033.5297051469.

The spelling of 8409139604 in words is "eight billion, four hundred nine million, one hundred thirty-nine thousand, six hundred four".