206764739 has 4 divisors (see below), whose sum is σ = 206817840. Its totient is φ = 206711640.

The previous prime is 206764729. The next prime is 206764741. The reversal of 206764739 is 937467602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206764739 - 2⁸ = 206764483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206764739.

It is not an unprimeable number, because it can be changed into a prime (206764729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20204 + ... + 28665.

It is an arithmetic number, because the mean of its divisors is an integer number (51704460).

Almost surely, 2^206764739 is an apocalyptic number.

206764739 is a deficient number, since it is larger than the sum of its proper divisors (53101).

206764739 is an equidigital number, since it uses as much as digits as its factorization.

206764739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53100.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 206764739 is about 14379.3163606619. The cubic root of 206764739 is about 591.3239816124.

The spelling of 206764739 in words is "two hundred six million, seven hundred sixty-four thousand, seven hundred thirty-nine".