4121655997 has 4 divisors (see below), whose sum is σ = 4338585280. Its totient is φ = 3904726716.

The previous prime is 4121655983. The next prime is 4121656027. The reversal of 4121655997 is 7995561214.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4121655997 - 2¹⁹ = 4121131709 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 4121655997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121655907) 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, 108464613 + ... + 108464650.

It is an arithmetic number, because the mean of its divisors is an integer number (1084646320).

Almost surely, 2^4121655997 is an apocalyptic number.

It is an amenable number.

4121655997 is a deficient number, since it is larger than the sum of its proper divisors (216929283).

4121655997 is a wasteful number, since it uses less digits than its factorization.

4121655997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216929282.

The product of its digits is 680400, while the sum is 49.

The square root of 4121655997 is about 64200.1245871065. The cubic root of 4121655997 is about 1603.3336739217. Note that the first 3 decimals are identical.

The spelling of 4121655997 in words is "four billion, one hundred twenty-one million, six hundred fifty-five thousand, nine hundred ninety-seven".