3992687121 has 8 divisors (see below), whose sum is σ = 5323938624. Its totient is φ = 2661613520.

The previous prime is 3992687089. The next prime is 3992687183. The reversal of 3992687121 is 1217862993.

3992687121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3992687121 - 2⁵ = 3992687089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3992687021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22156 + ... + 92066.

It is an arithmetic number, because the mean of its divisors is an integer number (665492328).

Almost surely, 2^3992687121 is an apocalyptic number.

It is an amenable number.

3992687121 is a deficient number, since it is larger than the sum of its proper divisors (1331251503).

3992687121 is a wasteful number, since it uses less digits than its factorization.

3992687121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88951.

The product of its digits is 326592, while the sum is 48.

The square root of 3992687121 is about 63187.7133705596. The cubic root of 3992687121 is about 1586.4330891940.

The spelling of 3992687121 in words is "three billion, nine hundred ninety-two million, six hundred eighty-seven thousand, one hundred twenty-one".