6990347617 has 4 divisors (see below), whose sum is σ = 7625833776. Its totient is φ = 6354861460.

The previous prime is 6990347587. The next prime is 6990347621. The reversal of 6990347617 is 7167430996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6990347617 - 2²³ = 6981959009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6990342617) 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, 317743063 + ... + 317743084.

It is an arithmetic number, because the mean of its divisors is an integer number (1906458444).

Almost surely, 2^6990347617 is an apocalyptic number.

It is an amenable number.

6990347617 is a deficient number, since it is larger than the sum of its proper divisors (635486159).

6990347617 is a wasteful number, since it uses less digits than its factorization.

6990347617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635486158.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 6990347617 is about 83608.2987328411. The cubic root of 6990347617 is about 1912.0515238278.

The spelling of 6990347617 in words is "six billion, nine hundred ninety million, three hundred forty-seven thousand, six hundred seventeen".