2087435440729 has 4 divisors (see below), whose sum is σ = 2087439853284. Its totient is φ = 2087431028176.

The previous prime is 2087435440723. The next prime is 2087435440757. The reversal of 2087435440729 is 9270445347802.

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 2037904712704 + 49530728025 = 1427552^2 + 222555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2087435440729 - 2⁹ = 2087435440217 is a prime.

It is a super-2 number, since 2×2087435440729² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2087435440729.

It is not an unprimeable number, because it can be changed into a prime (2087435440723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397962 + ... + 2475715.

It is an arithmetic number, because the mean of its divisors is an integer number (521859963321).

Almost surely, 2^{2087435440729} is an apocalyptic number.

It is an amenable number.

2087435440729 is a deficient number, since it is larger than the sum of its proper divisors (4412555).

2087435440729 is an equidigital number, since it uses as much as digits as its factorization.

2087435440729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412554.

The product of its (nonzero) digits is 13547520, while the sum is 55.

The spelling of 2087435440729 in words is "two trillion, eighty-seven billion, four hundred thirty-five million, four hundred forty thousand, seven hundred twenty-nine".