10987945 has 4 divisors (see below), whose sum is σ = 13185540. Its totient is φ = 8790352.

The previous prime is 10987931. The next prime is 10987957. The reversal of 10987945 is 54978901.

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 5702544 + 5285401 = 2388^2 + 2299^2 .

It is a cyclic number.

It is not a de Polignac number, because 10987945 - 2¹³ = 10979753 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098790 + ... + 1098799.

It is an arithmetic number, because the mean of its divisors is an integer number (3296385).

Almost surely, 2^10987945 is an apocalyptic number.

It is an amenable number.

10987945 is a deficient number, since it is larger than the sum of its proper divisors (2197595).

10987945 is an equidigital number, since it uses as much as digits as its factorization.

10987945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197594.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 10987945 is about 3314.8069325377. The cubic root of 10987945 is about 222.3167366940.

The spelling of 10987945 in words is "ten million, nine hundred eighty-seven thousand, nine hundred forty-five".