354145669 has 2 divisors, whose sum is σ = 354145670. Its totient is φ = 354145668.

The previous prime is 354145667. The next prime is 354145681. The reversal of 354145669 is 966541453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205549569 + 148596100 = 14337^2 + 12190^2 .

It is an emirp because it is prime and its reverse (966541453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354145669 - 2¹ = 354145667 is a prime.

It is a super-2 number, since 2×354145669² = 250838309742915122, which contains 22 as substring.

Together with 354145667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354145661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177072834 + 177072835.

It is an arithmetic number, because the mean of its divisors is an integer number (177072835).

Almost surely, 2^354145669 is an apocalyptic number.

It is an amenable number.

354145669 is a deficient number, since it is larger than the sum of its proper divisors (1).

354145669 is an equidigital number, since it uses as much as digits as its factorization.

354145669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 354145669 is about 18818.7584340732. The cubic root of 354145669 is about 707.5014131750.

The spelling of 354145669 in words is "three hundred fifty-four million, one hundred forty-five thousand, six hundred sixty-nine".