981260393 has 2 divisors, whose sum is σ = 981260394. Its totient is φ = 981260392.

The previous prime is 981260381. The next prime is 981260459. The reversal of 981260393 is 393062189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975437824 + 5822569 = 31232^2 + 2413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981260393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_49942436 and since 981260393 and 49942436 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981260393.

It is not a weakly prime, because it can be changed into another prime (981260303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490630196 + 490630197.

It is an arithmetic number, because the mean of its divisors is an integer number (490630197).

Almost surely, 2^981260393 is an apocalyptic number.

It is an amenable number.

981260393 is a deficient number, since it is larger than the sum of its proper divisors (1).

981260393 is an equidigital number, since it uses as much as digits as its factorization.

981260393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 981260393 is about 31325.0761052547. The cubic root of 981260393 is about 993.7140337549.

The spelling of 981260393 in words is "nine hundred eighty-one million, two hundred sixty thousand, three hundred ninety-three".