401424493 has 2 divisors, whose sum is σ = 401424494. Its totient is φ = 401424492.

The previous prime is 401424461. The next prime is 401424503. The reversal of 401424493 is 394424104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369139369 + 32285124 = 19213^2 + 5682^2 .

It is a cyclic number.

It is not a de Polignac number, because 401424493 - 2⁵ = 401424461 is a prime.

It is a super-2 number, since 2×401424493² = 322283247160614098, which contains 22 as substring.

It is equal to p_21407971 and since 401424493 and 21407971 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401427493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200712246 + 200712247.

It is an arithmetic number, because the mean of its divisors is an integer number (200712247).

Almost surely, 2^401424493 is an apocalyptic number.

It is an amenable number.

401424493 is a deficient number, since it is larger than the sum of its proper divisors (1).

401424493 is an equidigital number, since it uses as much as digits as its factorization.

401424493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 401424493 is about 20035.5806753885. The cubic root of 401424493 is about 737.6799096849.

Adding to 401424493 its reverse (394424104), we get a palindrome (795848597).

The spelling of 401424493 in words is "four hundred one million, four hundred twenty-four thousand, four hundred ninety-three".