891477 has 6 divisors (see below), whose sum is σ = 1287702. Its totient is φ = 594312.

The previous prime is 891439. The next prime is 891481. The reversal of 891477 is 774198.

It can be written as a sum of positive squares in only one way, i.e., 463761 + 427716 = 681^2 + 654^2 .

It is not a de Polignac number, because 891477 - 2⁷ = 891349 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891477.

It is not an unprimeable number, because it can be changed into a prime (891427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49518 + ... + 49535.

It is an arithmetic number, because the mean of its divisors is an integer number (214617).

2⁸⁹¹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

891477 is a deficient number, since it is larger than the sum of its proper divisors (396225).

891477 is a wasteful number, since it uses less digits than its factorization.

891477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99059 (or 99056 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 891477 is about 944.1805971317. The cubic root of 891477 is about 96.2431984849.

The spelling of 891477 in words is "eight hundred ninety-one thousand, four hundred seventy-seven".