354240647 has 2 divisors, whose sum is σ = 354240648. Its totient is φ = 354240646.

The previous prime is 354240613. The next prime is 354240671. The reversal of 354240647 is 746042453.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 354240647 - 2¹⁴ = 354224263 is a prime.

It is a super-3 number, since 3×354240647³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354240247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177120323 + 177120324.

It is an arithmetic number, because the mean of its divisors is an integer number (177120324).

Almost surely, 2^354240647 is an apocalyptic number.

354240647 is a deficient number, since it is larger than the sum of its proper divisors (1).

354240647 is an equidigital number, since it uses as much as digits as its factorization.

354240647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 354240647 is about 18821.2817576275. The cubic root of 354240647 is about 707.5646555720.

It can be divided in two parts, 3542406 and 47, that added together give a palindrome (3542453).

The spelling of 354240647 in words is "three hundred fifty-four million, two hundred forty thousand, six hundred forty-seven".