6981951 has 12 divisors (see below), whose sum is σ = 9890312. Its totient is φ = 4380288.

The previous prime is 6981943. The next prime is 6981959. The reversal of 6981951 is 1591896.

It is an interprime number because it is at equal distance from previous prime (6981943) and next prime (6981959).

It is not a de Polignac number, because 6981951 - 2³ = 6981943 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3160 + ... + 4893.

Almost surely, 2^6981951 is an apocalyptic number.

6981951 is a deficient number, since it is larger than the sum of its proper divisors (2908361).

6981951 is a wasteful number, since it uses less digits than its factorization.

6981951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090 (or 8073 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

The square root of 6981951 is about 2642.3381691222. The cubic root of 6981951 is about 191.1285648858.

It can be divided in two parts, 69819 and 51, that multiplied together give a square (3560769 = 1887²).

The spelling of 6981951 in words is "six million, nine hundred eighty-one thousand, nine hundred fifty-one".