206726345 has 12 divisors (see below), whose sum is σ = 288573444. Its totient is φ = 141755040.

The previous prime is 206726339. The next prime is 206726347. The reversal of 206726345 is 543627602.

It can be written as a sum of positive squares in 2 ways, for example, as 80658361 + 126067984 = 8981^2 + 11228^2 .

It is not a de Polignac number, because 206726345 - 2⁸ = 206726089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206726347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421646 + ... + 422135.

It is an arithmetic number, because the mean of its divisors is an integer number (24047787).

Almost surely, 2^206726345 is an apocalyptic number.

It is an amenable number.

206726345 is a deficient number, since it is larger than the sum of its proper divisors (81847099).

206726345 is an equidigital number, since it uses as much as digits as its factorization.

206726345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843800 (or 843793 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 206726345 is about 14377.9812560735. The cubic root of 206726345 is about 591.2873785010.

The spelling of 206726345 in words is "two hundred six million, seven hundred twenty-six thousand, three hundred forty-five".