402949 has 2 divisors, whose sum is σ = 402950. Its totient is φ = 402948.

The previous prime is 402947. The next prime is 402991. The reversal of 402949 is 949204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381924 + 21025 = 618^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 402949 - 2¹ = 402947 is a prime.

Together with 402947, it forms a pair of twin primes.

It is a congruent number.

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, 201474 + 201475.

It is an arithmetic number, because the mean of its divisors is an integer number (201475).

2⁴⁰²⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

402949 is a deficient number, since it is larger than the sum of its proper divisors (1).

402949 is an equidigital number, since it uses as much as digits as its factorization.

402949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 402949 is about 634.7826399643. The cubic root of 402949 is about 73.8612569547.

The spelling of 402949 in words is "four hundred two thousand, nine hundred forty-nine".