396727651609 has 2 divisors, whose sum is σ = 396727651610. Its totient is φ = 396727651608.

The previous prime is 396727651601. The next prime is 396727651627. The reversal of 396727651609 is 906156727693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234785795209 + 161941856400 = 484547^2 + 402420^2 .

It is a cyclic number.

It is not a de Polignac number, because 396727651609 - 2³ = 396727651601 is a prime.

It is a super-3 number, since 3×396727651609³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (396727651601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198363825804 + 198363825805.

It is an arithmetic number, because the mean of its divisors is an integer number (198363825805).

Almost surely, 2^396727651609 is an apocalyptic number.

It is an amenable number.

396727651609 is a deficient number, since it is larger than the sum of its proper divisors (1).

396727651609 is an equidigital number, since it uses as much as digits as its factorization.

396727651609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 396727651609 in words is "three hundred ninety-six billion, seven hundred twenty-seven million, six hundred fifty-one thousand, six hundred nine".