4787981 has 16 divisors (see below), whose sum is σ = 5683200. Its totient is φ = 3985200.

The previous prime is 4787971. The next prime is 4788011. The reversal of 4787981 is 1897874.

It is a cyclic number.

It is not a de Polignac number, because 4787981 - 2¹⁸ = 4525837 is a prime.

It is a super-2 number, since 2×4787981² = 45849524112722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4787941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6110 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (355200).

Almost surely, 2^4787981 is an apocalyptic number.

It is an amenable number.

4787981 is a deficient number, since it is larger than the sum of its proper divisors (895219).

4787981 is a wasteful number, since it uses less digits than its factorization.

4787981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 112896, while the sum is 44.

The square root of 4787981 is about 2188.1455618857. The cubic root of 4787981 is about 168.5456206985.

The spelling of 4787981 in words is "four million, seven hundred eighty-seven thousand, nine hundred eighty-one".