2091593477 has 4 divisors (see below), whose sum is σ = 2163717420. Its totient is φ = 2019469536.

The previous prime is 2091593459. The next prime is 2091593507. The reversal of 2091593477 is 7743951902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1407300196 + 684293281 = 37514^2 + 26159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091593477 - 2⁸ = 2091593221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091593377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36061928 + ... + 36061985.

It is an arithmetic number, because the mean of its divisors is an integer number (540929355).

Almost surely, 2^2091593477 is an apocalyptic number.

It is an amenable number.

2091593477 is a deficient number, since it is larger than the sum of its proper divisors (72123943).

2091593477 is an equidigital number, since it uses as much as digits as its factorization.

2091593477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72123942.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 2091593477 is about 45733.9422857903. The cubic root of 2091593477 is about 1278.8681149865.

The spelling of 2091593477 in words is "two billion, ninety-one million, five hundred ninety-three thousand, four hundred seventy-seven".