6950138257 has 4 divisors (see below), whose sum is σ = 6954304180. Its totient is φ = 6945972336.

The previous prime is 6950138219. The next prime is 6950138263. The reversal of 6950138257 is 7528310596.

6950138257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5711731776 + 1238406481 = 75576^2 + 35191^2 .

It is a cyclic number.

It is not a de Polignac number, because 6950138257 - 2¹¹ = 6950136209 is a prime.

It is a super-3 number, since 3×6950138257³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6950138287) 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, 2080458 + ... + 2083795.

It is an arithmetic number, because the mean of its divisors is an integer number (1738576045).

Almost surely, 2^6950138257 is an apocalyptic number.

It is an amenable number.

6950138257 is a deficient number, since it is larger than the sum of its proper divisors (4165923).

6950138257 is a wasteful number, since it uses less digits than its factorization.

6950138257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165922.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 6950138257 is about 83367.4892089236. The cubic root of 6950138257 is about 1908.3783515467.

The spelling of 6950138257 in words is "six billion, nine hundred fifty million, one hundred thirty-eight thousand, two hundred fifty-seven".