395798561987 has 2 divisors, whose sum is σ = 395798561988. Its totient is φ = 395798561986.

The previous prime is 395798561969. The next prime is 395798561999. The reversal of 395798561987 is 789165897593.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395798561987 - 2¹⁸ = 395798299843 is a prime.

It is not a weakly prime, because it can be changed into another prime (395798561687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197899280993 + 197899280994.

It is an arithmetic number, because the mean of its divisors is an integer number (197899280994).

Almost surely, 2^395798561987 is an apocalyptic number.

395798561987 is a deficient number, since it is larger than the sum of its proper divisors (1).

395798561987 is an equidigital number, since it uses as much as digits as its factorization.

395798561987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1028764800, while the sum is 77.

The spelling of 395798561987 in words is "three hundred ninety-five billion, seven hundred ninety-eight million, five hundred sixty-one thousand, nine hundred eighty-seven".