4319981 has 4 divisors (see below), whose sum is σ = 4351200. Its totient is φ = 4288764.

The previous prime is 4319969. The next prime is 4319993. The reversal of 4319981 is 1899134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1899134 = 2 ⋅949567.

It is an interprime number because it is at equal distance from previous prime (4319969) and next prime (4319993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4319981 is a prime.

It is a super-2 number, since 2×4319981² = 37324471680722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4319941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15401 + ... + 15678.

It is an arithmetic number, because the mean of its divisors is an integer number (1087800).

Almost surely, 2^4319981 is an apocalyptic number.

It is an amenable number.

4319981 is a deficient number, since it is larger than the sum of its proper divisors (31219).

4319981 is a wasteful number, since it uses less digits than its factorization.

4319981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31218.

The product of its digits is 7776, while the sum is 35.

The square root of 4319981 is about 2078.4563983880. The cubic root of 4319981 is about 162.8648182271.

The spelling of 4319981 in words is "four million, three hundred nineteen thousand, nine hundred eighty-one".