3279745981 has 4 divisors (see below), whose sum is σ = 3392840700. Its totient is φ = 3166651264.

The previous prime is 3279745951. The next prime is 3279745993. The reversal of 3279745981 is 1895479723.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1895479723 = 659 ⋅2876297.

It can be written as a sum of positive squares in 2 ways, for example, as 1929844900 + 1349901081 = 43930^2 + 36741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3279745981 is a prime.

It is a super-2 number, since 2×3279745981² = 21513467399771304722, 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 (3279745901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56547316 + ... + 56547373.

It is an arithmetic number, because the mean of its divisors is an integer number (848210175).

Almost surely, 2^3279745981 is an apocalyptic number.

It is an amenable number.

3279745981 is a deficient number, since it is larger than the sum of its proper divisors (113094719).

3279745981 is a wasteful number, since it uses less digits than its factorization.

3279745981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113094718.

The product of its digits is 3810240, while the sum is 55.

The square root of 3279745981 is about 57269.0665281005. The cubic root of 3279745981 is about 1485.7534116752.

The spelling of 3279745981 in words is "three billion, two hundred seventy-nine million, seven hundred forty-five thousand, nine hundred eighty-one".