345660649 has 2 divisors, whose sum is σ = 345660650. Its totient is φ = 345660648.

The previous prime is 345660641. The next prime is 345660671. The reversal of 345660649 is 946066543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320660649 + 25000000 = 17907^2 + 5000^2 .

It is an emirp because it is prime and its reverse (946066543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345660649 - 2³ = 345660641 is a prime.

It is equal to p_18582847 and since 345660649 and 18582847 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (345660641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172830324 + 172830325.

It is an arithmetic number, because the mean of its divisors is an integer number (172830325).

Almost surely, 2^345660649 is an apocalyptic number.

It is an amenable number.

345660649 is a deficient number, since it is larger than the sum of its proper divisors (1).

345660649 is an equidigital number, since it uses as much as digits as its factorization.

345660649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 345660649 is about 18591.9511886192. The cubic root of 345660649 is about 701.8053054070.

The spelling of 345660649 in words is "three hundred forty-five million, six hundred sixty thousand, six hundred forty-nine".