5629781 has 2 divisors, whose sum is σ = 5629782. Its totient is φ = 5629780.

The previous prime is 5629769. The next prime is 5629787. The reversal of 5629781 is 1879265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4165681 + 1464100 = 2041^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 5629781 - 2¹⁰ = 5628757 is a prime.

It is a super-2 number, since 2×5629781² = 63388868215922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5629787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2814890 + 2814891.

It is an arithmetic number, because the mean of its divisors is an integer number (2814891).

Almost surely, 2^5629781 is an apocalyptic number.

It is an amenable number.

5629781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5629781 is an equidigital number, since it uses as much as digits as its factorization.

5629781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 5629781 is about 2372.7159543443. The cubic root of 5629781 is about 177.8950376428.

The spelling of 5629781 in words is "five million, six hundred twenty-nine thousand, seven hundred eighty-one".