343690987 has 4 divisors (see below), whose sum is σ = 352073736. Its totient is φ = 335308240.

The previous prime is 343690961. The next prime is 343690993. The reversal of 343690987 is 789096343.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 343690987 - 2⁷ = 343690859 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343690987.

It is not an unprimeable number, because it can be changed into a prime (343690927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4191313 + ... + 4191394.

It is an arithmetic number, because the mean of its divisors is an integer number (88018434).

Almost surely, 2^343690987 is an apocalyptic number.

343690987 is a deficient number, since it is larger than the sum of its proper divisors (8382749).

343690987 is an equidigital number, since it uses as much as digits as its factorization.

343690987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382748.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 343690987 is about 18538.9046871707. The cubic root of 343690987 is about 700.4697438856.

The spelling of 343690987 in words is "three hundred forty-three million, six hundred ninety thousand, nine hundred eighty-seven".