354891217 has 2 divisors, whose sum is σ = 354891218. Its totient is φ = 354891216.

The previous prime is 354891211. The next prime is 354891259. The reversal of 354891217 is 712198453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345625281 + 9265936 = 18591^2 + 3044^2 .

It is a cyclic number.

It is not a de Polignac number, because 354891217 - 2³ = 354891209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 354891217.

It is not a weakly prime, because it can be changed into another prime (354891211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177445608 + 177445609.

It is an arithmetic number, because the mean of its divisors is an integer number (177445609).

Almost surely, 2^354891217 is an apocalyptic number.

It is an amenable number.

354891217 is a deficient number, since it is larger than the sum of its proper divisors (1).

354891217 is an equidigital number, since it uses as much as digits as its factorization.

354891217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 354891217 is about 18838.5566591499. The cubic root of 354891217 is about 707.9975428697.

The spelling of 354891217 in words is "three hundred fifty-four million, eight hundred ninety-one thousand, two hundred seventeen".