2091554459 has 2 divisors, whose sum is σ = 2091554460. Its totient is φ = 2091554458.

The previous prime is 2091554431. The next prime is 2091554483. The reversal of 2091554459 is 9544551902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2091554459 - 2²⁸ = 1823119003 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091554419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045777229 + 1045777230.

It is an arithmetic number, because the mean of its divisors is an integer number (1045777230).

Almost surely, 2^2091554459 is an apocalyptic number.

2091554459 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091554459 is an equidigital number, since it uses as much as digits as its factorization.

2091554459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 2091554459 is about 45733.5157078482. The cubic root of 2091554459 is about 1278.8601626466.

The spelling of 2091554459 in words is "two billion, ninety-one million, five hundred fifty-four thousand, four hundred fifty-nine".