1087680961 has 4 divisors (see below), whose sum is σ = 1151662212. Its totient is φ = 1023699712.

The previous prime is 1087680943. The next prime is 1087680983. The reversal of 1087680961 is 1690867801.

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 686440000 + 401240961 = 26200^2 + 20031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087680961 - 2⁹ = 1087680449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1087680901) 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, 31990600 + ... + 31990633.

It is an arithmetic number, because the mean of its divisors is an integer number (287915553).

Almost surely, 2^1087680961 is an apocalyptic number.

It is an amenable number.

1087680961 is a deficient number, since it is larger than the sum of its proper divisors (63981251).

1087680961 is an equidigital number, since it uses as much as digits as its factorization.

1087680961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63981250.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 1087680961 is about 32980.0085051535. The cubic root of 1087680961 is about 1028.4120946819.

The spelling of 1087680961 in words is "one billion, eighty-seven million, six hundred eighty thousand, nine hundred sixty-one".