396019871977 has 2 divisors, whose sum is σ = 396019871978. Its totient is φ = 396019871976.

The previous prime is 396019871917. The next prime is 396019872089. The reversal of 396019871977 is 779178910693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332618646361 + 63401225616 = 576731^2 + 251796^2 .

It is a cyclic number.

It is not a de Polignac number, because 396019871977 - 2³⁵ = 361660133609 is a prime.

It is not a weakly prime, because it can be changed into another prime (396019871917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198009935988 + 198009935989.

It is an arithmetic number, because the mean of its divisors is an integer number (198009935989).

Almost surely, 2^396019871977 is an apocalyptic number.

It is an amenable number.

396019871977 is a deficient number, since it is larger than the sum of its proper divisors (1).

396019871977 is an equidigital number, since it uses as much as digits as its factorization.

396019871977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36006768, while the sum is 67.

The spelling of 396019871977 in words is "three hundred ninety-six billion, nineteen million, eight hundred seventy-one thousand, nine hundred seventy-seven".