206591494 has 4 divisors (see below), whose sum is σ = 309887244. Its totient is φ = 103295746.

The previous prime is 206591491. The next prime is 206591501. The reversal of 206591494 is 494195602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494195602 = 2 ⋅247097801.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206591491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51647872 + ... + 51647875.

It is an arithmetic number, because the mean of its divisors is an integer number (77471811).

Almost surely, 2^206591494 is an apocalyptic number.

206591494 is a deficient number, since it is larger than the sum of its proper divisors (103295750).

206591494 is a wasteful number, since it uses less digits than its factorization.

206591494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103295749.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 206591494 is about 14373.2909940626. The cubic root of 206591494 is about 591.1587817028.

The spelling of 206591494 in words is "two hundred six million, five hundred ninety-one thousand, four hundred ninety-four".