6974725981 has 2 divisors, whose sum is σ = 6974725982. Its totient is φ = 6974725980.

The previous prime is 6974725951. The next prime is 6974725999. The reversal of 6974725981 is 1895274796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4776053881 + 2198672100 = 69109^2 + 46890^2 .

It is a cyclic number.

It is not a de Polignac number, because 6974725981 - 2¹⁷ = 6974594909 is a prime.

It is a super-2 number, since 2×6974725981² = 97293605020072824722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6974725921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3487362990 + 3487362991.

It is an arithmetic number, because the mean of its divisors is an integer number (3487362991).

Almost surely, 2^6974725981 is an apocalyptic number.

It is an amenable number.

6974725981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6974725981 is an equidigital number, since it uses as much as digits as its factorization.

6974725981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The square root of 6974725981 is about 83514.8249174959. The cubic root of 6974725981 is about 1910.6261464191.

The spelling of 6974725981 in words is "six billion, nine hundred seventy-four million, seven hundred twenty-five thousand, nine hundred eighty-one".