354256109 has 2 divisors, whose sum is σ = 354256110. Its totient is φ = 354256108.

The previous prime is 354256099. The next prime is 354256151. The reversal of 354256109 is 901652453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319622884 + 34633225 = 17878^2 + 5885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354256109 is a prime.

It is a super-3 number, since 3×354256109³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354256909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177128054 + 177128055.

It is an arithmetic number, because the mean of its divisors is an integer number (177128055).

Almost surely, 2^354256109 is an apocalyptic number.

It is an amenable number.

354256109 is a deficient number, since it is larger than the sum of its proper divisors (1).

354256109 is an equidigital number, since it uses as much as digits as its factorization.

354256109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 354256109 is about 18821.6925115676. The cubic root of 354256109 is about 707.5749500856.

The spelling of 354256109 in words is "three hundred fifty-four million, two hundred fifty-six thousand, one hundred nine".