947381 has 2 divisors, whose sum is σ = 947382. Its totient is φ = 947380.

The previous prime is 947377. The next prime is 947383. The reversal of 947381 is 183749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 707281 + 240100 = 841^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 947381 - 2² = 947377 is a prime.

It is a super-2 number, since 2×947381² = 1795061518322, which contains 22 as substring.

Together with 947383, it forms a pair of twin primes.

It is a Chen 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 947381.

It is not a weakly prime, because it can be changed into another prime (947383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473690 + 473691.

It is an arithmetic number, because the mean of its divisors is an integer number (473691).

2⁹⁴⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

947381 is a deficient number, since it is larger than the sum of its proper divisors (1).

947381 is an equidigital number, since it uses as much as digits as its factorization.

947381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 947381 is about 973.3349885831. The cubic root of 947381 is about 98.2143372089.

The spelling of 947381 in words is "nine hundred forty-seven thousand, three hundred eighty-one".