400242223987 has 2 divisors, whose sum is σ = 400242223988. Its totient is φ = 400242223986.

The previous prime is 400242223963. The next prime is 400242224003. The reversal of 400242223987 is 789322242004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400242223987 is a prime.

It is not a weakly prime, because it can be changed into another prime (400242223907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200121111993 + 200121111994.

It is an arithmetic number, because the mean of its divisors is an integer number (200121111994).

Almost surely, 2^400242223987 is an apocalyptic number.

400242223987 is a deficient number, since it is larger than the sum of its proper divisors (1).

400242223987 is an equidigital number, since it uses as much as digits as its factorization.

400242223987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 400242223987 in words is "four hundred billion, two hundred forty-two million, two hundred twenty-three thousand, nine hundred eighty-seven".