343977809 has 4 divisors (see below), whose sum is σ = 393117504. Its totient is φ = 294838116.

The previous prime is 343977797. The next prime is 343977833. The reversal of 343977809 is 908779343.

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.

It is a cyclic number.

It is not a de Polignac number, because 343977809 - 2⁴ = 343977793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343977839) 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, 24569837 + ... + 24569850.

It is an arithmetic number, because the mean of its divisors is an integer number (98279376).

Almost surely, 2^343977809 is an apocalyptic number.

It is an amenable number.

343977809 is a deficient number, since it is larger than the sum of its proper divisors (49139695).

343977809 is an equidigital number, since it uses as much as digits as its factorization.

343977809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49139694.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 343977809 is about 18546.6387520758. The cubic root of 343977809 is about 700.6645451048.

The spelling of 343977809 in words is "three hundred forty-three million, nine hundred seventy-seven thousand, eight hundred nine".