354018781 has 2 divisors, whose sum is σ = 354018782. Its totient is φ = 354018780.

The previous prime is 354018779. The next prime is 354018787. The reversal of 354018781 is 187810453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229249881 + 124768900 = 15141^2 + 11170^2 .

It is an emirp because it is prime and its reverse (187810453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354018781 - 2¹ = 354018779 is a prime.

It is a super-2 number, since 2×354018781² = 250658594601451922, which contains 22 as substring.

Together with 354018779, it forms a pair of twin primes.

It is equal to p_19007659 and since 354018781 and 19007659 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 354018781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354018787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177009390 + 177009391.

It is an arithmetic number, because the mean of its divisors is an integer number (177009391).

Almost surely, 2^354018781 is an apocalyptic number.

It is an amenable number.

354018781 is a deficient number, since it is larger than the sum of its proper divisors (1).

354018781 is an equidigital number, since it uses as much as digits as its factorization.

354018781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 354018781 is about 18815.3868150511. The cubic root of 354018781 is about 707.4169054229.

The spelling of 354018781 in words is "three hundred fifty-four million, eighteen thousand, seven hundred eighty-one".