345191617 has 2 divisors, whose sum is σ = 345191618. Its totient is φ = 345191616.

The previous prime is 345191593. The next prime is 345191621. The reversal of 345191617 is 716191543.

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., 217592001 + 127599616 = 14751^2 + 11296^2 .

It is a cyclic number.

It is not a de Polignac number, because 345191617 - 2⁷ = 345191489 is a prime.

It is not a weakly prime, because it can be changed into another prime (345191687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172595808 + 172595809.

It is an arithmetic number, because the mean of its divisors is an integer number (172595809).

Almost surely, 2^345191617 is an apocalyptic number.

It is an amenable number.

345191617 is a deficient number, since it is larger than the sum of its proper divisors (1).

345191617 is an equidigital number, since it uses as much as digits as its factorization.

345191617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 345191617 is about 18579.3330612269. Note that the first 3 decimals coincide. The cubic root of 345191617 is about 701.4877317558.

The spelling of 345191617 in words is "three hundred forty-five million, one hundred ninety-one thousand, six hundred seventeen".