400424183639 has 2 divisors, whose sum is σ = 400424183640. Its totient is φ = 400424183638.

The previous prime is 400424183629. The next prime is 400424183641. The reversal of 400424183639 is 936381424004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400424183639 is a prime.

Together with 400424183641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400424183639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400424183629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200212091819 + 200212091820.

It is an arithmetic number, because the mean of its divisors is an integer number (200212091820).

Almost surely, 2^400424183639 is an apocalyptic number.

400424183639 is a deficient number, since it is larger than the sum of its proper divisors (1).

400424183639 is an equidigital number, since it uses as much as digits as its factorization.

400424183639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 400424183639 in words is "four hundred billion, four hundred twenty-four million, one hundred eighty-three thousand, six hundred thirty-nine".