4723981 has 2 divisors, whose sum is σ = 4723982. Its totient is φ = 4723980.

The previous prime is 4723949. The next prime is 4723987. The reversal of 4723981 is 1893274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 455625 = 2066^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 4723981 - 2⁵ = 4723949 is a prime.

It is a super-2 number, since 2×4723981² = 44631992976722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4723987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2361990 + 2361991.

It is an arithmetic number, because the mean of its divisors is an integer number (2361991).

Almost surely, 2^4723981 is an apocalyptic number.

It is an amenable number.

4723981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4723981 is an equidigital number, since it uses as much as digits as its factorization.

4723981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 4723981 is about 2173.4721070214. The cubic root of 4723981 is about 167.7912775451.

The spelling of 4723981 in words is "four million, seven hundred twenty-three thousand, nine hundred eighty-one".