10781993 has 2 divisors, whose sum is σ = 10781994. Its totient is φ = 10781992.

The previous prime is 10781983. The next prime is 10782011. The reversal of 10781993 is 39918701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10738729 + 43264 = 3277^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 10781993 - 2⁴ = 10781977 is a prime.

It is not a weakly prime, because it can be changed into another prime (10781983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5390996 + 5390997.

It is an arithmetic number, because the mean of its divisors is an integer number (5390997).

Almost surely, 2^10781993 is an apocalyptic number.

It is an amenable number.

10781993 is a deficient number, since it is larger than the sum of its proper divisors (1).

10781993 is an equidigital number, since it uses as much as digits as its factorization.

10781993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 10781993 is about 3283.5945242980. The cubic root of 10781993 is about 220.9189727733.

The spelling of 10781993 in words is "ten million, seven hundred eighty-one thousand, nine hundred ninety-three".