397809701369 has 2 divisors, whose sum is σ = 397809701370. Its totient is φ = 397809701368.

The previous prime is 397809701257. The next prime is 397809701383. The reversal of 397809701369 is 963107908793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366736825744 + 31072875625 = 605588^2 + 176275^2 .

It is a cyclic number.

It is not a de Polignac number, because 397809701369 - 2¹² = 397809697273 is a prime.

It is a super-2 number, since 2×397809701369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (397809706369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198904850684 + 198904850685.

It is an arithmetic number, because the mean of its divisors is an integer number (198904850685).

Almost surely, 2^397809701369 is an apocalyptic number.

It is an amenable number.

397809701369 is a deficient number, since it is larger than the sum of its proper divisors (1).

397809701369 is an equidigital number, since it uses as much as digits as its factorization.

397809701369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 397809701369 in words is "three hundred ninety-seven billion, eight hundred nine million, seven hundred one thousand, three hundred sixty-nine".