402947 has 2 divisors, whose sum is σ = 402948. Its totient is φ = 402946.

The previous prime is 402943. The next prime is 402949. The reversal of 402947 is 749204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402947 - 2² = 402943 is a prime.

Together with 402949, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402947.

It is not a weakly prime, because it can be changed into another prime (402943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201473 + 201474.

It is an arithmetic number, because the mean of its divisors is an integer number (201474).

2⁴⁰²⁹⁴⁷ is an apocalyptic number.

402947 is a deficient number, since it is larger than the sum of its proper divisors (1).

402947 is an equidigital number, since it uses as much as digits as its factorization.

402947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 402947 is about 634.7810646199. The cubic root of 402947 is about 73.8611347534.

The spelling of 402947 in words is "four hundred two thousand, nine hundred forty-seven".