402847 has 2 divisors, whose sum is σ = 402848. Its totient is φ = 402846.

The previous prime is 402823. The next prime is 402851. The reversal of 402847 is 748204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402847 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402817) 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 as a sum of consecutive naturals, namely, 201423 + 201424.

It is an arithmetic number, because the mean of its divisors is an integer number (201424).

2⁴⁰²⁸⁴⁷ is an apocalyptic number.

402847 is a deficient number, since it is larger than the sum of its proper divisors (1).

402847 is an equidigital number, since it uses as much as digits as its factorization.

402847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 402847 is about 634.7022924175. The cubic root of 402847 is about 73.8550241693.

The spelling of 402847 in words is "four hundred two thousand, eight hundred forty-seven".