3872784917 has 2 divisors, whose sum is σ = 3872784918. Its totient is φ = 3872784916.

The previous prime is 3872784907. The next prime is 3872784973. The reversal of 3872784917 is 7194872783.

It is a happy number.

It is an a-pointer prime, because the next prime (3872784973) can be obtained adding 3872784917 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3465794641 + 406990276 = 58871^2 + 20174^2 .

It is a cyclic number.

It is not a de Polignac number, because 3872784917 - 2⁴ = 3872784901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3872784907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936392458 + 1936392459.

It is an arithmetic number, because the mean of its divisors is an integer number (1936392459).

Almost surely, 2^3872784917 is an apocalyptic number.

It is an amenable number.

3872784917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3872784917 is an equidigital number, since it uses as much as digits as its factorization.

3872784917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 3872784917 is about 62231.7034717836. The cubic root of 3872784917 is about 1570.3909823165.

The spelling of 3872784917 in words is "three billion, eight hundred seventy-two million, seven hundred eighty-four thousand, nine hundred seventeen".