7672981 has 2 divisors, whose sum is σ = 7672982. Its totient is φ = 7672980.

The previous prime is 7672943. The next prime is 7672993. The reversal of 7672981 is 1892767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 81 = 2770^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 7672981 - 2⁷ = 7672853 is a prime.

It is a super-2 number, since 2×7672981² = 117749274852722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

7672981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7672901) 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 as a sum of consecutive naturals, namely, 3836490 + 3836491.

It is an arithmetic number, because the mean of its divisors is an integer number (3836491).

Almost surely, 2^7672981 is an apocalyptic number.

It is an amenable number.

7672981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7672981 is an equidigital number, since it uses as much as digits as its factorization.

7672981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 7672981 is about 2770.0146209000. The cubic root of 7672981 is about 197.2368422703.

It can be divided in two parts, 76729 and 81, that multiplied together give a square (6215049 = 2493²).

The spelling of 7672981 in words is "seven million, six hundred seventy-two thousand, nine hundred eighty-one".