847149 has 4 divisors (see below), whose sum is σ = 1129536. Its totient is φ = 564764.

The previous prime is 847139. The next prime is 847151. The reversal of 847149 is 941748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 847149 - 2¹⁵ = 814381 is a prime.

It is a super-2 number, since 2×847149² = 1435322856402, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847109) 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, 141189 + ... + 141194.

It is an arithmetic number, because the mean of its divisors is an integer number (282384).

2⁸⁴⁷¹⁴⁹ is an apocalyptic number.

It is an amenable number.

847149 is a deficient number, since it is larger than the sum of its proper divisors (282387).

847149 is a wasteful number, since it uses less digits than its factorization.

847149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282386.

The product of its digits is 8064, while the sum is 33.

The square root of 847149 is about 920.4069752017. The cubic root of 847149 is about 94.6207967841.

The spelling of 847149 in words is "eight hundred forty-seven thousand, one hundred forty-nine".