340878917 has 8 divisors (see below), whose sum is σ = 365500800. Its totient is φ = 316764864.

The previous prime is 340878911. The next prime is 340878949. The reversal of 340878917 is 719878043.

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 340878917 - 2¹⁰ = 340877893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340878911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125567 + ... + 128252.

It is an arithmetic number, because the mean of its divisors is an integer number (45687600).

Almost surely, 2^340878917 is an apocalyptic number.

It is an amenable number.

340878917 is a deficient number, since it is larger than the sum of its proper divisors (24621883).

340878917 is a wasteful number, since it uses less digits than its factorization.

340878917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253915.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 340878917 is about 18462.9065154975. The cubic root of 340878917 is about 698.5541018488.

The spelling of 340878917 in words is "three hundred forty million, eight hundred seventy-eight thousand, nine hundred seventeen".