8402279 has 2 divisors, whose sum is σ = 8402280. Its totient is φ = 8402278.

The previous prime is 8402221. The next prime is 8402309. The reversal of 8402279 is 9722048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8402279 - 2¹² = 8398183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8402179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4201139 + 4201140.

It is an arithmetic number, because the mean of its divisors is an integer number (4201140).

Almost surely, 2^8402279 is an apocalyptic number.

8402279 is a deficient number, since it is larger than the sum of its proper divisors (1).

8402279 is an equidigital number, since it uses as much as digits as its factorization.

8402279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 8402279 is about 2898.6684874266. The cubic root of 8402279 is about 203.2976535681.

The spelling of 8402279 in words is "eight million, four hundred two thousand, two hundred seventy-nine".