396727717409 has 2 divisors, whose sum is σ = 396727717410. Its totient is φ = 396727717408.

The previous prime is 396727717403. The next prime is 396727717447. The reversal of 396727717409 is 904717727693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261857358400 + 134870359009 = 511720^2 + 367247^2 .

It is a cyclic number.

It is not a de Polignac number, because 396727717409 - 2³⁶ = 328008240673 is a prime.

It is not a weakly prime, because it can be changed into another prime (396727717403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198363858704 + 198363858705.

It is an arithmetic number, because the mean of its divisors is an integer number (198363858705).

Almost surely, 2^396727717409 is an apocalyptic number.

It is an amenable number.

396727717409 is a deficient number, since it is larger than the sum of its proper divisors (1).

396727717409 is an equidigital number, since it uses as much as digits as its factorization.

396727717409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28005264, while the sum is 62.

The spelling of 396727717409 in words is "three hundred ninety-six billion, seven hundred twenty-seven million, seven hundred seventeen thousand, four hundred nine".