2087661305 has 8 divisors (see below), whose sum is σ = 2512415232. Its totient is φ = 1665314608.

The previous prime is 2087661259. The next prime is 2087661307. The reversal of 2087661305 is 5031667802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2087661305 - 2¹⁸ = 2087399161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2087661307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599897 + ... + 603366.

It is an arithmetic number, because the mean of its divisors is an integer number (314051904).

Almost surely, 2^2087661305 is an apocalyptic number.

It is an amenable number.

2087661305 is a deficient number, since it is larger than the sum of its proper divisors (424753927).

2087661305 is a wasteful number, since it uses less digits than its factorization.

2087661305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203615.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 2087661305 is about 45690.9324155242. The cubic root of 2087661305 is about 1278.0661930607.

The spelling of 2087661305 in words is "two billion, eighty-seven million, six hundred sixty-one thousand, three hundred five".