343872505 has 8 divisors (see below), whose sum is σ = 422243712. Its totient is φ = 268700208.

The previous prime is 343872497. The next prime is 343872521. The reversal of 343872505 is 505278343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343872505 - 2³ = 343872497 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799489 + ... + 799918.

It is an arithmetic number, because the mean of its divisors is an integer number (52780464).

Almost surely, 2^343872505 is an apocalyptic number.

It is an amenable number.

343872505 is a deficient number, since it is larger than the sum of its proper divisors (78371207).

343872505 is a wasteful number, since it uses less digits than its factorization.

343872505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599455.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 343872505 is about 18543.7996376147. The cubic root of 343872505 is about 700.5930382539.

The spelling of 343872505 in words is "three hundred forty-three million, eight hundred seventy-two thousand, five hundred five".