4121505679 has 4 divisors (see below), whose sum is σ = 4131583120. Its totient is φ = 4111428240.

The previous prime is 4121505673. The next prime is 4121505683. The reversal of 4121505679 is 9765051214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9765051214 = 2 ⋅4882525607.

It is a cyclic number.

It is not a de Polignac number, because 4121505679 - 2¹⁹ = 4120981391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121505673) 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, 5038107 + ... + 5038924.

It is an arithmetic number, because the mean of its divisors is an integer number (1032895780).

Almost surely, 2^4121505679 is an apocalyptic number.

4121505679 is a deficient number, since it is larger than the sum of its proper divisors (10077441).

4121505679 is a wasteful number, since it uses less digits than its factorization.

4121505679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077440.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 4121505679 is about 64198.9538777697. The cubic root of 4121505679 is about 1603.3141823354.

The spelling of 4121505679 in words is "four billion, one hundred twenty-one million, five hundred five thousand, six hundred seventy-nine".