3442591781 has 2 divisors, whose sum is σ = 3442591782. Its totient is φ = 3442591780.

The previous prime is 3442591729. The next prime is 3442591793. The reversal of 3442591781 is 1871952443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2635179556 + 807412225 = 51334^2 + 28415^2 .

It is a cyclic number.

It is not a de Polignac number, because 3442591781 - 2²⁶ = 3375482917 is a prime.

It is a super-2 number, since 2×3442591781² = 23702876341217503922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3442501781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1721295890 + 1721295891.

It is an arithmetic number, because the mean of its divisors is an integer number (1721295891).

Almost surely, 2^3442591781 is an apocalyptic number.

It is an amenable number.

3442591781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3442591781 is an equidigital number, since it uses as much as digits as its factorization.

3442591781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 3442591781 is about 58673.6037839845. The cubic root of 3442591781 is about 1509.9474830791.

The spelling of 3442591781 in words is "three billion, four hundred forty-two million, five hundred ninety-one thousand, seven hundred eighty-one".