400360259987 has 2 divisors, whose sum is σ = 400360259988. Its totient is φ = 400360259986.

The previous prime is 400360259977. The next prime is 400360260029. The reversal of 400360259987 is 789952063004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400360259987 - 2³⁶ = 331640783251 is a prime.

It is not a weakly prime, because it can be changed into another prime (400360259977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200180129993 + 200180129994.

It is an arithmetic number, because the mean of its divisors is an integer number (200180129994).

Almost surely, 2^400360259987 is an apocalyptic number.

400360259987 is a deficient number, since it is larger than the sum of its proper divisors (1).

400360259987 is an equidigital number, since it uses as much as digits as its factorization.

400360259987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 400360259987 in words is "four hundred billion, three hundred sixty million, two hundred fifty-nine thousand, nine hundred eighty-seven".