3693399921 has 12 divisors (see below), whose sum is σ = 5335794048. Its totient is φ = 2461859064.

The previous prime is 3693399917. The next prime is 3693399937. The reversal of 3693399921 is 1299933963.

It is a happy number.

It is not a de Polignac number, because 3693399921 - 2² = 3693399917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3693399971) 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 11 ways as a sum of consecutive naturals, for example, 29716 + ... + 90938.

It is an arithmetic number, because the mean of its divisors is an integer number (444649504).

Almost surely, 2^3693399921 is an apocalyptic number.

It is an amenable number.

3693399921 is a deficient number, since it is larger than the sum of its proper divisors (1642394127).

3693399921 is a wasteful number, since it uses less digits than its factorization.

3693399921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67932 (or 67929 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 54.

The square root of 3693399921 is about 60773.3487723031. The cubic root of 3693399921 is about 1545.7601676011.

The spelling of 3693399921 in words is "three billion, six hundred ninety-three million, three hundred ninety-nine thousand, nine hundred twenty-one".