345409879 has 2 divisors, whose sum is σ = 345409880. Its totient is φ = 345409878.

The previous prime is 345409853. The next prime is 345409903. The reversal of 345409879 is 978904543.

It is a strong prime.

It is an emirp because it is prime and its reverse (978904543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345409879 - 2⁷ = 345409751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345409819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172704939 + 172704940.

It is an arithmetic number, because the mean of its divisors is an integer number (172704940).

Almost surely, 2^345409879 is an apocalyptic number.

345409879 is a deficient number, since it is larger than the sum of its proper divisors (1).

345409879 is an equidigital number, since it uses as much as digits as its factorization.

345409879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 345409879 is about 18585.2059176109. The cubic root of 345409879 is about 701.6355490350.

The spelling of 345409879 in words is "three hundred forty-five million, four hundred nine thousand, eight hundred seventy-nine".