400782244997 has 2 divisors, whose sum is σ = 400782244998. Its totient is φ = 400782244996.

The previous prime is 400782244981. The next prime is 400782245029. The reversal of 400782244997 is 799442287004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245888048641 + 154894196356 = 495871^2 + 393566^2 .

It is a cyclic number.

It is not a de Polignac number, because 400782244997 - 2⁴ = 400782244981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400782244927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200391122498 + 200391122499.

It is an arithmetic number, because the mean of its divisors is an integer number (200391122499).

Almost surely, 2^400782244997 is an apocalyptic number.

It is an amenable number.

400782244997 is a deficient number, since it is larger than the sum of its proper divisors (1).

400782244997 is an equidigital number, since it uses as much as digits as its factorization.

400782244997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 400782244997 in words is "four hundred billion, seven hundred eighty-two million, two hundred forty-four thousand, nine hundred ninety-seven".