4911981 has 8 divisors (see below), whose sum is σ = 6760704. Its totient is φ = 3168960.

The previous prime is 4911961. The next prime is 4912007. The reversal of 4911981 is 1891194.

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

It is not a de Polignac number, because 4911981 - 2⁷ = 4911853 is a prime.

It is a super-2 number, since 2×4911981² = 48255114688722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4911901) 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, 26316 + ... + 26501.

It is an arithmetic number, because the mean of its divisors is an integer number (845088).

Almost surely, 2^4911981 is an apocalyptic number.

It is an amenable number.

4911981 is a deficient number, since it is larger than the sum of its proper divisors (1848723).

4911981 is a wasteful number, since it uses less digits than its factorization.

4911981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52851.

The product of its digits is 2592, while the sum is 33.

The square root of 4911981 is about 2216.2989419300. The cubic root of 4911981 is about 169.9882460155.

The spelling of 4911981 in words is "four million, nine hundred eleven thousand, nine hundred eighty-one".