346400807 has 2 divisors, whose sum is σ = 346400808. Its totient is φ = 346400806.

The previous prime is 346400797. The next prime is 346400809. The reversal of 346400807 is 708004643.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (708004643) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 346400807 - 2²² = 342206503 is a prime.

Together with 346400809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346400809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173200403 + 173200404.

It is an arithmetic number, because the mean of its divisors is an integer number (173200404).

Almost surely, 2^346400807 is an apocalyptic number.

346400807 is a deficient number, since it is larger than the sum of its proper divisors (1).

346400807 is an equidigital number, since it uses as much as digits as its factorization.

346400807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 346400807 is about 18611.8458783647. The cubic root of 346400807 is about 702.3058700426.

The spelling of 346400807 in words is "three hundred forty-six million, four hundred thousand, eight hundred seven".