9774245381 has 2 divisors, whose sum is σ = 9774245382. Its totient is φ = 9774245380.

The previous prime is 9774245359. The next prime is 9774245399. The reversal of 9774245381 is 1835424779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7498001281 + 2276244100 = 86591^2 + 47710^2 .

It is a cyclic number.

It is not a de Polignac number, because 9774245381 - 2¹⁸ = 9773983237 is a prime.

It is a super-2 number, since 2×9774245381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9774245321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4887122690 + 4887122691.

It is an arithmetic number, because the mean of its divisors is an integer number (4887122691).

Almost surely, 2^9774245381 is an apocalyptic number.

It is an amenable number.

9774245381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9774245381 is an equidigital number, since it uses as much as digits as its factorization.

9774245381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 9774245381 is about 98864.7833204524. The cubic root of 9774245381 is about 2138.0986825284.

The spelling of 9774245381 in words is "nine billion, seven hundred seventy-four million, two hundred forty-five thousand, three hundred eighty-one".