1659458891 has 2 divisors, whose sum is σ = 1659458892. Its totient is φ = 1659458890.

The previous prime is 1659458863. The next prime is 1659458897. The reversal of 1659458891 is 1988549561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1659458891 - 2¹⁰ = 1659457867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659458897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829729445 + 829729446.

It is an arithmetic number, because the mean of its divisors is an integer number (829729446).

Almost surely, 2^1659458891 is an apocalyptic number.

1659458891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659458891 is an equidigital number, since it uses as much as digits as its factorization.

1659458891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 56.

The square root of 1659458891 is about 40736.4565346570. The cubic root of 1659458891 is about 1183.9194791217.

The spelling of 1659458891 in words is "one billion, six hundred fifty-nine million, four hundred fifty-eight thousand, eight hundred ninety-one".