4121736981 has 4 divisors (see below), whose sum is σ = 5495649312. Its totient is φ = 2747824652.

The previous prime is 4121736979. The next prime is 4121737001. The reversal of 4121736981 is 1896371214.

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 4121736981 - 2¹ = 4121736979 is a prime.

It is a super-2 number, since 2×4121736981² = 33977431481085988722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121736961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686956161 + ... + 686956166.

It is an arithmetic number, because the mean of its divisors is an integer number (1373912328).

Almost surely, 2^4121736981 is an apocalyptic number.

It is an amenable number.

4121736981 is a deficient number, since it is larger than the sum of its proper divisors (1373912331).

4121736981 is a wasteful number, since it uses less digits than its factorization.

4121736981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373912330.

The product of its digits is 72576, while the sum is 42.

The square root of 4121736981 is about 64200.7552992954. The cubic root of 4121736981 is about 1603.3441748405.

The spelling of 4121736981 in words is "four billion, one hundred twenty-one million, seven hundred thirty-six thousand, nine hundred eighty-one".