400412242213993 has 2 divisors, whose sum is σ = 400412242213994. Its totient is φ = 400412242213992.

The previous prime is 400412242213937. The next prime is 400412242214041. The reversal of 400412242213993 is 399312242214004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400397418664489 + 14823549504 = 20009933^2 + 121752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400412242213993 is a prime.

It is not a weakly prime, because it can be changed into another prime (400412242813993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200206121106996 + 200206121106997.

It is an arithmetic number, because the mean of its divisors is an integer number (200206121106997).

Almost surely, 2^{400412242213993} is an apocalyptic number.

It is an amenable number.

400412242213993 is a deficient number, since it is larger than the sum of its proper divisors (1).

400412242213993 is an equidigital number, since it uses as much as digits as its factorization.

400412242213993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 46.

Adding to 400412242213993 its reverse (399312242214004), we get a palindrome (799724484427997).

The spelling of 400412242213993 in words is "four hundred trillion, four hundred twelve billion, two hundred forty-two million, two hundred thirteen thousand, nine hundred ninety-three".