7748981 has 2 divisors, whose sum is σ = 7748982. Its totient is φ = 7748980.

The previous prime is 7748969. The next prime is 7749029. The reversal of 7748981 is 1898477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 136900 = 2759^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 7748981 - 2¹⁴ = 7732597 is a prime.

It is a super-2 number, since 2×7748981² = 120093413076722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7748911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874490 + 3874491.

It is an arithmetic number, because the mean of its divisors is an integer number (3874491).

Almost surely, 2^7748981 is an apocalyptic number.

It is an amenable number.

7748981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7748981 is an equidigital number, since it uses as much as digits as its factorization.

7748981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 7748981 is about 2783.6991575959. The cubic root of 7748981 is about 197.8859067887.

The spelling of 7748981 in words is "seven million, seven hundred forty-eight thousand, nine hundred eighty-one".