418012393 has 2 divisors, whose sum is σ = 418012394. Its totient is φ = 418012392.

The previous prime is 418012349. The next prime is 418012411. The reversal of 418012393 is 393210814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396925929 + 21086464 = 19923^2 + 4592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-418012393 is a prime.

It is equal to p_22244638 and since 418012393 and 22244638 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (418012333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209006196 + 209006197.

It is an arithmetic number, because the mean of its divisors is an integer number (209006197).

Almost surely, 2^418012393 is an apocalyptic number.

418012393 is the 10929-th centered heptagonal number.

It is an amenable number.

418012393 is a deficient number, since it is larger than the sum of its proper divisors (1).

418012393 is an equidigital number, since it uses as much as digits as its factorization.

418012393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 418012393 is about 20445.3513787364. The cubic root of 418012393 is about 747.7040262152.

The spelling of 418012393 in words is "four hundred eighteen million, twelve thousand, three hundred ninety-three".