345147661 has 2 divisors, whose sum is σ = 345147662. Its totient is φ = 345147660.

The previous prime is 345147643. The next prime is 345147679. The reversal of 345147661 is 166741543.

It is a balanced prime because it is at equal distance from previous prime (345147643) and next prime (345147679).

It can be written as a sum of positive squares in only one way, i.e., 267813225 + 77334436 = 16365^2 + 8794^2 .

It is a cyclic number.

It is not a de Polignac number, because 345147661 - 2⁷ = 345147533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345147661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345147601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172573830 + 172573831.

It is an arithmetic number, because the mean of its divisors is an integer number (172573831).

Almost surely, 2^345147661 is an apocalyptic number.

It is an amenable number.

345147661 is a deficient number, since it is larger than the sum of its proper divisors (1).

345147661 is an equidigital number, since it uses as much as digits as its factorization.

345147661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 345147661 is about 18578.1500962825. The cubic root of 345147661 is about 701.4579551504.

The spelling of 345147661 in words is "three hundred forty-five million, one hundred forty-seven thousand, six hundred sixty-one".