3693721961 has 8 divisors (see below), whose sum is σ = 4057177920. Its totient is φ = 3347170992.

The previous prime is 3693721931. The next prime is 3693721987. The reversal of 3693721961 is 1691273963.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3693721961 - 2¹⁴ = 3693705577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3693721931) 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 7 ways as a sum of consecutive naturals, for example, 4225790 + ... + 4226663.

It is an arithmetic number, because the mean of its divisors is an integer number (507147240).

Almost surely, 2^3693721961 is an apocalyptic number.

It is an amenable number.

3693721961 is a deficient number, since it is larger than the sum of its proper divisors (363455959).

3693721961 is a wasteful number, since it uses less digits than its factorization.

3693721961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8452495.

The product of its digits is 367416, while the sum is 47.

The square root of 3693721961 is about 60775.9982312097. The cubic root of 3693721961 is about 1545.8050929767.

The spelling of 3693721961 in words is "three billion, six hundred ninety-three million, seven hundred twenty-one thousand, nine hundred sixty-one".