6987138357 has 8 divisors (see below), whose sum is σ = 9357961984. Its totient is φ = 4637203488.

The previous prime is 6987138343. The next prime is 6987138373. The reversal of 6987138357 is 7538317896.

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

It is not a de Polignac number, because 6987138357 - 2⁸ = 6987138101 is a prime.

It is a super-3 number, since 3×6987138357³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6987138297 and 6987138306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987138377) 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, 5221408 + ... + 5222745.

It is an arithmetic number, because the mean of its divisors is an integer number (1169745248).

Almost surely, 2^6987138357 is an apocalyptic number.

It is an amenable number.

6987138357 is a deficient number, since it is larger than the sum of its proper divisors (2370823627).

6987138357 is a wasteful number, since it uses less digits than its factorization.

6987138357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10444379.

The product of its digits is 7620480, while the sum is 57.

The square root of 6987138357 is about 83589.1042959547. The cubic root of 6987138357 is about 1911.7588722029.

The spelling of 6987138357 in words is "six billion, nine hundred eighty-seven million, one hundred thirty-eight thousand, three hundred fifty-seven".