3987344591 has 2 divisors, whose sum is σ = 3987344592. Its totient is φ = 3987344590.

The previous prime is 3987344573. The next prime is 3987344597. The reversal of 3987344591 is 1954437893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3987344591 - 2¹⁰ = 3987343567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3987344597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993672295 + 1993672296.

It is an arithmetic number, because the mean of its divisors is an integer number (1993672296).

Almost surely, 2^3987344591 is an apocalyptic number.

3987344591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3987344591 is an equidigital number, since it uses as much as digits as its factorization.

3987344591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The square root of 3987344591 is about 63145.4241493396. The cubic root of 3987344591 is about 1585.7251825259.

The spelling of 3987344591 in words is "three billion, nine hundred eighty-seven million, three hundred forty-four thousand, five hundred ninety-one".