206740157 has 8 divisors (see below), whose sum is σ = 224725536. Its totient is φ = 189052272.

The previous prime is 206740153. The next prime is 206740181. The reversal of 206740157 is 751047602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206740157 - 2² = 206740153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206740151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72923 + ... + 75704.

It is an arithmetic number, because the mean of its divisors is an integer number (28090692).

Almost surely, 2^206740157 is an apocalyptic number.

It is an amenable number.

206740157 is a deficient number, since it is larger than the sum of its proper divisors (17985379).

206740157 is a wasteful number, since it uses less digits than its factorization.

206740157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148747.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 206740157 is about 14378.4615658282. The cubic root of 206740157 is about 591.3005467619.

Adding to 206740157 its reverse (751047602), we get a palindrome (957787759).

It can be divided in two parts, 2067 and 40157, that added together give a palindrome (42224).

The spelling of 206740157 in words is "two hundred six million, seven hundred forty thousand, one hundred fifty-seven".