346400009 has 4 divisors (see below), whose sum is σ = 347106000. Its totient is φ = 345694020.

The previous prime is 346399967. The next prime is 346400027. The reversal of 346400009 is 900004643.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900004643 = 3323 ⋅270841.

It is a cyclic number.

It is not a de Polignac number, because 346400009 - 2¹⁶ = 346334473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346400809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352259 + ... + 353240.

It is an arithmetic number, because the mean of its divisors is an integer number (86776500).

Almost surely, 2^346400009 is an apocalyptic number.

It is an amenable number.

346400009 is a deficient number, since it is larger than the sum of its proper divisors (705991).

346400009 is an equidigital number, since it uses as much as digits as its factorization.

346400009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705990.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 346400009 is about 18611.8244403927. The cubic root of 346400009 is about 702.3053307439.

The spelling of 346400009 in words is "three hundred forty-six million, four hundred thousand, nine".