10033781 has 2 divisors, whose sum is σ = 10033782. Its totient is φ = 10033780.

The previous prime is 10033769. The next prime is 10033783. The reversal of 10033781 is 18733001.

It is a happy number.

10033781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8031556 + 2002225 = 2834^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10033781 is a prime.

It is a super-2 number, since 2×10033781² = 201353522311922, which contains 22 as substring.

Together with 10033783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10033783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5016890 + 5016891.

It is an arithmetic number, because the mean of its divisors is an integer number (5016891).

Almost surely, 2^10033781 is an apocalyptic number.

It is an amenable number.

10033781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10033781 is an equidigital number, since it uses as much as digits as its factorization.

10033781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 10033781 is about 3167.6144020382. The cubic root of 10033781 is about 215.6857928705.

Adding to 10033781 its reverse (18733001), we get a palindrome (28766782).

The spelling of 10033781 in words is "ten million, thirty-three thousand, seven hundred eighty-one".