345881807 has 2 divisors, whose sum is σ = 345881808. Its totient is φ = 345881806.

The previous prime is 345881803. The next prime is 345881819. The reversal of 345881807 is 708188543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345881807 - 2² = 345881803 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345881801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172940903 + 172940904.

It is an arithmetic number, because the mean of its divisors is an integer number (172940904).

Almost surely, 2^345881807 is an apocalyptic number.

345881807 is a deficient number, since it is larger than the sum of its proper divisors (1).

345881807 is an equidigital number, since it uses as much as digits as its factorization.

345881807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 345881807 is about 18597.8979188509. The cubic root of 345881807 is about 701.9549480967.

The spelling of 345881807 in words is "three hundred forty-five million, eight hundred eighty-one thousand, eight hundred seven".