345676553 has 2 divisors, whose sum is σ = 345676554. Its totient is φ = 345676552.

The previous prime is 345676543. The next prime is 345676561. The reversal of 345676553 is 355676543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242206969 + 103469584 = 15563^2 + 10172^2 .

It is a cyclic number.

It is not a de Polignac number, because 345676553 - 2¹⁰ = 345675529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (345676523) 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, 172838276 + 172838277.

It is an arithmetic number, because the mean of its divisors is an integer number (172838277).

Almost surely, 2^345676553 is an apocalyptic number.

It is an amenable number.

345676553 is a deficient number, since it is larger than the sum of its proper divisors (1).

345676553 is an equidigital number, since it uses as much as digits as its factorization.

345676553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 44.

The square root of 345676553 is about 18592.3788956658. The cubic root of 345676553 is about 701.8160686999.

The spelling of 345676553 in words is "three hundred forty-five million, six hundred seventy-six thousand, five hundred fifty-three".