400082479 has 2 divisors, whose sum is σ = 400082480. Its totient is φ = 400082478.

The previous prime is 400082453. The next prime is 400082509. The reversal of 400082479 is 974280004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400082479 - 2⁷ = 400082351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400782479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200041239 + 200041240.

It is an arithmetic number, because the mean of its divisors is an integer number (200041240).

Almost surely, 2^400082479 is an apocalyptic number.

400082479 is a deficient number, since it is larger than the sum of its proper divisors (1).

400082479 is an equidigital number, since it uses as much as digits as its factorization.

400082479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 400082479 is about 20002.0618687174. The cubic root of 400082479 is about 736.8569387867.

The spelling of 400082479 in words is "four hundred million, eighty-two thousand, four hundred seventy-nine".