401394517 has 2 divisors, whose sum is σ = 401394518. Its totient is φ = 401394516.

The previous prime is 401394491. The next prime is 401394533. The reversal of 401394517 is 715493104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219306481 + 182088036 = 14809^2 + 13494^2 .

It is a cyclic number.

It is not a de Polignac number, because 401394517 - 2¹¹ = 401392469 is a prime.

It is a super-3 number, since 3×401394517³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401394547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200697258 + 200697259.

It is an arithmetic number, because the mean of its divisors is an integer number (200697259).

Almost surely, 2^401394517 is an apocalyptic number.

It is an amenable number.

401394517 is a deficient number, since it is larger than the sum of its proper divisors (1).

401394517 is an equidigital number, since it uses as much as digits as its factorization.

401394517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 401394517 is about 20034.8325922629. The cubic root of 401394517 is about 737.6615473745.

The spelling of 401394517 in words is "four hundred one million, three hundred ninety-four thousand, five hundred seventeen".