947861 has 2 divisors, whose sum is σ = 947862. Its totient is φ = 947860.

The previous prime is 947857. The next prime is 947873. The reversal of 947861 is 168749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 323761 = 790^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 947861 - 2² = 947857 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473930 + 473931.

It is an arithmetic number, because the mean of its divisors is an integer number (473931).

2⁹⁴⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

947861 is a deficient number, since it is larger than the sum of its proper divisors (1).

947861 is an equidigital number, since it uses as much as digits as its factorization.

947861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 947861 is about 973.5815322817. The cubic root of 947861 is about 98.2309214984.

The spelling of 947861 in words is "nine hundred forty-seven thousand, eight hundred sixty-one".