206317394 has 4 divisors (see below), whose sum is σ = 309476094. Its totient is φ = 103158696.

The previous prime is 206317387. The next prime is 206317411. The reversal of 206317394 is 493713602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493713602 = 2 ⋅246856801.

It can be written as a sum of positive squares in only one way, i.e., 177555625 + 28761769 = 13325^2 + 5363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51579347 + ... + 51579350.

Almost surely, 2^206317394 is an apocalyptic number.

206317394 is a deficient number, since it is larger than the sum of its proper divisors (103158700).

206317394 is a wasteful number, since it uses less digits than its factorization.

206317394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103158699.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 206317394 is about 14363.7527826122. The cubic root of 206317394 is about 590.8972215037.

The spelling of 206317394 in words is "two hundred six million, three hundred seventeen thousand, three hundred ninety-four".