206612401 has 4 divisors (see below), whose sum is σ = 206641152. Its totient is φ = 206583652.

The previous prime is 206612359. The next prime is 206612431. The reversal of 206612401 is 104216602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206612401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206612431) 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 3 ways as a sum of consecutive naturals, for example, 6936 + ... + 21478.

It is an arithmetic number, because the mean of its divisors is an integer number (51660288).

Almost surely, 2^206612401 is an apocalyptic number.

It is an amenable number.

206612401 is a deficient number, since it is larger than the sum of its proper divisors (28751).

206612401 is a wasteful number, since it uses less digits than its factorization.

206612401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28750.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 206612401 is about 14374.0182621284. The cubic root of 206612401 is about 591.1787227299.

The spelling of 206612401 in words is "two hundred six million, six hundred twelve thousand, four hundred one".