342989217 has 12 divisors (see below), whose sum is σ = 496306980. Its totient is φ = 228254208.

The previous prime is 342989201. The next prime is 342989261. The reversal of 342989217 is 712989243.

342989217 is a `hidden beast` number, since 3 + 429 + 8 + 9 + 217 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26718561 + 316270656 = 5169^2 + 17784^2 .

It is not a de Polignac number, because 342989217 - 2⁴ = 342989201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (342989417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28368 + ... + 38609.

It is an arithmetic number, because the mean of its divisors is an integer number (41358915).

Almost surely, 2^342989217 is an apocalyptic number.

It is an amenable number.

342989217 is a deficient number, since it is larger than the sum of its proper divisors (153317763).

342989217 is a wasteful number, since it uses less digits than its factorization.

342989217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67552 (or 67549 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 342989217 is about 18519.9680615275. The cubic root of 342989217 is about 699.9926645490.

It can be divided in two parts, 342989 and 217, that added together give a triangular number (343206 = T₈₂₈).

The spelling of 342989217 in words is "three hundred forty-two million, nine hundred eighty-nine thousand, two hundred seventeen".