6986311906 has 12 divisors (see below), whose sum is σ = 12190401558. Its totient is φ = 2994133632.

The previous prime is 6986311873. The next prime is 6986311907. The reversal of 6986311906 is 6091136896.

It can be written as a sum of positive squares in only one way, i.e., 3655290681 + 3331021225 = 60459^2 + 57715^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 6986311906.

It is not an unprimeable number, because it can be changed into a prime (6986311907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35644351 + ... + 35644546.

Almost surely, 2^6986311906 is an apocalyptic number.

6986311906 is a deficient number, since it is larger than the sum of its proper divisors (5204089652).

6986311906 is a wasteful number, since it uses less digits than its factorization.

6986311906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71288913 (or 71288906 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 6986311906 is about 83584.1606167101. The cubic root of 6986311906 is about 1911.6834938316.

The spelling of 6986311906 in words is "six billion, nine hundred eighty-six million, three hundred eleven thousand, nine hundred six".