947491 has 4 divisors (see below), whose sum is σ = 954000. Its totient is φ = 940984.

The previous prime is 947483. The next prime is 947501. The reversal of 947491 is 194749.

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 947491 - 2³ = 947483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947411) 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 3 ways as a sum of consecutive naturals, for example, 3031 + ... + 3328.

It is an arithmetic number, because the mean of its divisors is an integer number (238500).

2⁹⁴⁷⁴⁹¹ is an apocalyptic number.

947491 is a deficient number, since it is larger than the sum of its proper divisors (6509).

947491 is a wasteful number, since it uses less digits than its factorization.

947491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508.

The product of its digits is 9072, while the sum is 34.

The square root of 947491 is about 973.3914936961. The cubic root of 947491 is about 98.2181382700.

The spelling of 947491 in words is "nine hundred forty-seven thousand, four hundred ninety-one".