7690981 has 2 divisors, whose sum is σ = 7690982. Its totient is φ = 7690980.

The previous prime is 7690973. The next prime is 7691017. The reversal of 7690981 is 1890967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7474756 + 216225 = 2734^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 7690981 - 2³ = 7690973 is a prime.

It is a super-2 number, since 2×7690981² = 118302377484722, which contains 22 as substring.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7690951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845490 + 3845491.

It is an arithmetic number, because the mean of its divisors is an integer number (3845491).

Almost surely, 2^7690981 is an apocalyptic number.

It is an amenable number.

7690981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7690981 is an equidigital number, since it uses as much as digits as its factorization.

7690981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 7690981 is about 2773.2617979556. The cubic root of 7690981 is about 197.3909540639.

The spelling of 7690981 in words is "seven million, six hundred ninety thousand, nine hundred eighty-one".