7122318685 has 4 divisors (see below), whose sum is σ = 8546782428. Its totient is φ = 5697854944.

The previous prime is 7122318683. The next prime is 7122318719. The reversal of 7122318685 is 5868132217.

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 5654739204 + 1467579481 = 75198^2 + 38309^2 .

It is a cyclic number.

It is not a de Polignac number, because 7122318685 - 2¹ = 7122318683 is a prime.

It is a super-3 number, since 3×7122318685³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7122318683) 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, 712231864 + ... + 712231873.

It is an arithmetic number, because the mean of its divisors is an integer number (2136695607).

Almost surely, 2^7122318685 is an apocalyptic number.

It is an amenable number.

7122318685 is a deficient number, since it is larger than the sum of its proper divisors (1424463743).

7122318685 is a wasteful number, since it uses less digits than its factorization.

7122318685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424463742.

The product of its digits is 161280, while the sum is 43.

The square root of 7122318685 is about 84393.8308468101. The cubic root of 7122318685 is about 1924.0091542111.

The spelling of 7122318685 in words is "seven billion, one hundred twenty-two million, three hundred eighteen thousand, six hundred eighty-five".