345209663 has 2 divisors, whose sum is σ = 345209664. Its totient is φ = 345209662.

The previous prime is 345209659. The next prime is 345209671. The reversal of 345209663 is 366902543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345209663 - 2² = 345209659 is a prime.

It is a super-2 number, since 2×345209663² = 238339422857147138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345209603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172604831 + 172604832.

It is an arithmetic number, because the mean of its divisors is an integer number (172604832).

Almost surely, 2^345209663 is an apocalyptic number.

345209663 is a deficient number, since it is larger than the sum of its proper divisors (1).

345209663 is an equidigital number, since it uses as much as digits as its factorization.

345209663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 345209663 is about 18579.8187020218. The cubic root of 345209663 is about 701.4999557172.

The spelling of 345209663 in words is "three hundred forty-five million, two hundred nine thousand, six hundred sixty-three".