397841413 has 2 divisors, whose sum is σ = 397841414. Its totient is φ = 397841412.

The previous prime is 397841407. The next prime is 397841441. The reversal of 397841413 is 314148793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204575809 + 193265604 = 14303^2 + 13902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397841413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397841713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198920706 + 198920707.

It is an arithmetic number, because the mean of its divisors is an integer number (198920707).

Almost surely, 2^397841413 is an apocalyptic number.

It is an amenable number.

397841413 is a deficient number, since it is larger than the sum of its proper divisors (1).

397841413 is an equidigital number, since it uses as much as digits as its factorization.

397841413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 397841413 is about 19945.9623232373. The cubic root of 397841413 is about 735.4785246743.

The spelling of 397841413 in words is "three hundred ninety-seven million, eight hundred forty-one thousand, four hundred thirteen".