3671397821 has 16 divisors (see below), whose sum is σ = 4603906944. Its totient is φ = 2850030144.

The previous prime is 3671397799. The next prime is 3671397857. The reversal of 3671397821 is 1287931763.

It is not a de Polignac number, because 3671397821 - 2¹⁴ = 3671381437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3671397871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375791 + ... + 385436.

It is an arithmetic number, because the mean of its divisors is an integer number (287744184).

Almost surely, 2^3671397821 is an apocalyptic number.

It is an amenable number.

3671397821 is a deficient number, since it is larger than the sum of its proper divisors (932509123).

3671397821 is a wasteful number, since it uses less digits than its factorization.

3671397821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761300.

The product of its digits is 381024, while the sum is 47.

The square root of 3671397821 is about 60592.0607093042. The cubic root of 3671397821 is about 1542.6846158097.

The spelling of 3671397821 in words is "three billion, six hundred seventy-one million, three hundred ninety-seven thousand, eight hundred twenty-one".