890012917587 has 4 divisors (see below), whose sum is σ = 1186683890120. Its totient is φ = 593341945056.

The previous prime is 890012917559. The next prime is 890012917589. The reversal of 890012917587 is 785719210098.

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

It is a de Polignac number, because none of the positive numbers 2^k-890012917587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890012917589) 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, 148335486262 + ... + 148335486267.

It is an arithmetic number, because the mean of its divisors is an integer number (296670972530).

Almost surely, 2^890012917587 is an apocalyptic number.

890012917587 is a deficient number, since it is larger than the sum of its proper divisors (296670972533).

890012917587 is a wasteful number, since it uses less digits than its factorization.

890012917587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296670972532.

The product of its (nonzero) digits is 2540160, while the sum is 57.

The spelling of 890012917587 in words is "eight hundred ninety billion, twelve million, nine hundred seventeen thousand, five hundred eighty-seven".