9776381 has 2 divisors, whose sum is σ = 9776382. Its totient is φ = 9776380.

The previous prime is 9776369. The next prime is 9776387. The reversal of 9776381 is 1836779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6916900 + 2859481 = 2630^2 + 1691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9776381 is a prime.

It is a super-2 number, since 2×9776381² = 191155250914322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9776387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4888190 + 4888191.

It is an arithmetic number, because the mean of its divisors is an integer number (4888191).

Almost surely, 2^9776381 is an apocalyptic number.

It is an amenable number.

9776381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9776381 is an equidigital number, since it uses as much as digits as its factorization.

9776381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 9776381 is about 3126.7204863883. The cubic root of 9776381 is about 213.8254392133.

The spelling of 9776381 in words is "nine million, seven hundred seventy-six thousand, three hundred eighty-one".