38661653 has 2 divisors, whose sum is σ = 38661654. Its totient is φ = 38661652.

The previous prime is 38661631. The next prime is 38661659. The reversal of 38661653 is 35616683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 10804369 = 5278^2 + 3287^2 .

It is a cyclic number.

It is not a de Polignac number, because 38661653 - 2⁸ = 38661397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38661659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19330826 + 19330827.

It is an arithmetic number, because the mean of its divisors is an integer number (19330827).

Almost surely, 2^38661653 is an apocalyptic number.

It is an amenable number.

38661653 is a deficient number, since it is larger than the sum of its proper divisors (1).

38661653 is an equidigital number, since it uses as much as digits as its factorization.

38661653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 38661653 is about 6217.8495478742. The cubic root of 38661653 is about 338.1376054674.

The spelling of 38661653 in words is "thirty-eight million, six hundred sixty-one thousand, six hundred fifty-three".