5653781 has 8 divisors (see below), whose sum is σ = 6491520. Its totient is φ = 4823568.

The previous prime is 5653763. The next prime is 5653783. The reversal of 5653781 is 1873565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5653781 is a prime.

It is a super-2 number, since 2×5653781² = 63930479191922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5653783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (811440).

Almost surely, 2^5653781 is an apocalyptic number.

It is an amenable number.

5653781 is a deficient number, since it is larger than the sum of its proper divisors (837739).

5653781 is a wasteful number, since it uses less digits than its factorization.

5653781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3763.

The product of its digits is 25200, while the sum is 35.

The square root of 5653781 is about 2377.7680711121. The cubic root of 5653781 is about 178.1474706852.

The spelling of 5653781 in words is "five million, six hundred fifty-three thousand, seven hundred eighty-one".