2073891565 has 4 divisors (see below), whose sum is σ = 2488669884. Its totient is φ = 1659113248.

The previous prime is 2073891559. The next prime is 2073891571. The reversal of 2073891565 is 5651983702.

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

It is an interprime number because it is at equal distance from previous prime (2073891559) and next prime (2073891571).

It can be written as a sum of positive squares in 2 ways, for example, as 1252381321 + 821510244 = 35389^2 + 28662^2 .

It is a cyclic number.

It is not a de Polignac number, because 2073891565 - 2¹³ = 2073883373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207389152 + ... + 207389161.

It is an arithmetic number, because the mean of its divisors is an integer number (622167471).

Almost surely, 2^2073891565 is an apocalyptic number.

It is an amenable number.

2073891565 is a deficient number, since it is larger than the sum of its proper divisors (414778319).

2073891565 is an equidigital number, since it uses as much as digits as its factorization.

2073891565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414778318.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 2073891565 is about 45539.9996157224. Note that the first 3 decimals coincide. The cubic root of 2073891565 is about 1275.2500475880.

The spelling of 2073891565 in words is "two billion, seventy-three million, eight hundred ninety-one thousand, five hundred sixty-five".