8402969 has 2 divisors, whose sum is σ = 8402970. Its totient is φ = 8402968.

The previous prime is 8402963. The next prime is 8402971. The reversal of 8402969 is 9692048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7912969 + 490000 = 2813^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8402969 is a prime.

It is a super-2 number, since 2×8402969² = 141219776029922, which contains 22 as substring.

Together with 8402971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8402963) 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, 4201484 + 4201485.

It is an arithmetic number, because the mean of its divisors is an integer number (4201485).

Almost surely, 2^8402969 is an apocalyptic number.

It is an amenable number.

8402969 is a deficient number, since it is larger than the sum of its proper divisors (1).

8402969 is an equidigital number, since it uses as much as digits as its factorization.

8402969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8402969 is about 2898.7875051476. The cubic root of 8402969 is about 203.3032183893.

The spelling of 8402969 in words is "eight million, four hundred two thousand, nine hundred sixty-nine".