6981513 has 16 divisors (see below), whose sum is σ = 11606016. Its totient is φ = 3626640.

The previous prime is 6981503. The next prime is 6981539. The reversal of 6981513 is 3151896.

It is not a de Polignac number, because 6981513 - 2⁴ = 6981497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

6981513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6981503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14881 + ... + 15342.

It is an arithmetic number, because the mean of its divisors is an integer number (725376).

Almost surely, 2^6981513 is an apocalyptic number.

It is an amenable number.

6981513 is a deficient number, since it is larger than the sum of its proper divisors (4624503).

6981513 is a wasteful number, since it uses less digits than its factorization.

6981513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30244.

The product of its digits is 6480, while the sum is 33.

The square root of 6981513 is about 2642.2552866822. The cubic root of 6981513 is about 191.1245681012.

It can be divided in two parts, 698 and 1513, that added together give a triangular number (2211 = T₆₆).

The spelling of 6981513 in words is "six million, nine hundred eighty-one thousand, five hundred thirteen".