400443599987 has 2 divisors, whose sum is σ = 400443599988. Its totient is φ = 400443599986.

The previous prime is 400443599947. The next prime is 400443600001. The reversal of 400443599987 is 789995344004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400443599987 - 2¹⁰ = 400443598963 is a prime.

It is not a weakly prime, because it can be changed into another prime (400443599947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200221799993 + 200221799994.

It is an arithmetic number, because the mean of its divisors is an integer number (200221799994).

Almost surely, 2^400443599987 is an apocalyptic number.

400443599987 is a deficient number, since it is larger than the sum of its proper divisors (1).

400443599987 is an equidigital number, since it uses as much as digits as its factorization.

400443599987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 400443599987 in words is "four hundred billion, four hundred forty-three million, five hundred ninety-nine thousand, nine hundred eighty-seven".