8371729349 has 4 divisors (see below), whose sum is σ = 8378632236. Its totient is φ = 8364826464.

The previous prime is 8371729259. The next prime is 8371729357. The reversal of 8371729349 is 9439271738.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1485717025 + 6886012324 = 38545^2 + 82982^2 .

It is a cyclic number.

It is not a de Polignac number, because 8371729349 - 2²⁸ = 8103293893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8371729349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8371729549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449624 + ... + 3452049.

It is an arithmetic number, because the mean of its divisors is an integer number (2094658059).

Almost surely, 2^8371729349 is an apocalyptic number.

It is an amenable number.

8371729349 is a deficient number, since it is larger than the sum of its proper divisors (6902887).

8371729349 is a wasteful number, since it uses less digits than its factorization.

8371729349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902886.

The product of its digits is 2286144, while the sum is 53.

The square root of 8371729349 is about 91497.1548683346. The cubic root of 8371729349 is about 2030.5096594573.

The spelling of 8371729349 in words is "eight billion, three hundred seventy-one million, seven hundred twenty-nine thousand, three hundred forty-nine".