38683661 has 2 divisors, whose sum is σ = 38683662. Its totient is φ = 38683660.

The previous prime is 38683657. The next prime is 38683663. The reversal of 38683661 is 16638683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28153636 + 10530025 = 5306^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 38683661 - 2² = 38683657 is a prime.

Together with 38683663, 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 (38683663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19341830 + 19341831.

It is an arithmetic number, because the mean of its divisors is an integer number (19341831).

Almost surely, 2^38683661 is an apocalyptic number.

It is an amenable number.

38683661 is a deficient number, since it is larger than the sum of its proper divisors (1).

38683661 is an equidigital number, since it uses as much as digits as its factorization.

38683661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 38683661 is about 6219.6190397805. The cubic root of 38683661 is about 338.2017544818.

The spelling of 38683661 in words is "thirty-eight million, six hundred eighty-three thousand, six hundred sixty-one".