896509891 has 4 divisors (see below), whose sum is σ = 903569152. Its totient is φ = 889450632.

The previous prime is 896509883. The next prime is 896509903. The reversal of 896509891 is 198905698.

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

It is a cyclic number.

It is not a de Polignac number, because 896509891 - 2³ = 896509883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (896509871) by changing a digit.

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, 3529440 + ... + 3529693.

It is an arithmetic number, because the mean of its divisors is an integer number (225892288).

Almost surely, 2^896509891 is an apocalyptic number.

896509891 is a deficient number, since it is larger than the sum of its proper divisors (7059261).

896509891 is a wasteful number, since it uses less digits than its factorization.

896509891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7059260.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 896509891 is about 29941.7750141838. The cubic root of 896509891 is about 964.2397444810.

The spelling of 896509891 in words is "eight hundred ninety-six million, five hundred nine thousand, eight hundred ninety-one".