345391807 has 2 divisors, whose sum is σ = 345391808. Its totient is φ = 345391806.

The previous prime is 345391793. The next prime is 345391811. The reversal of 345391807 is 708193543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345391807 - 2¹⁵ = 345359039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345391807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345391817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172695903 + 172695904.

It is an arithmetic number, because the mean of its divisors is an integer number (172695904).

Almost surely, 2^345391807 is an apocalyptic number.

345391807 is a deficient number, since it is larger than the sum of its proper divisors (1).

345391807 is an equidigital number, since it uses as much as digits as its factorization.

345391807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 345391807 is about 18584.7197180910. The cubic root of 345391807 is about 701.6233121926.

The spelling of 345391807 in words is "three hundred forty-five million, three hundred ninety-one thousand, eight hundred seven".