38663957 has 2 divisors, whose sum is σ = 38663958. Its totient is φ = 38663956.

The previous prime is 38663843. The next prime is 38663959. The reversal of 38663957 is 75936683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28366276 + 10297681 = 5326^2 + 3209^2 .

It is an emirp because it is prime and its reverse (75936683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38663957 - 2¹⁰ = 38662933 is a prime.

Together with 38663959, 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 (38663959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19331978 + 19331979.

It is an arithmetic number, because the mean of its divisors is an integer number (19331979).

Almost surely, 2^38663957 is an apocalyptic number.

It is an amenable number.

38663957 is a deficient number, since it is larger than the sum of its proper divisors (1).

38663957 is an equidigital number, since it uses as much as digits as its factorization.

38663957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 38663957 is about 6218.0348181721. The cubic root of 38663957 is about 338.1443223173.

The spelling of 38663957 in words is "thirty-eight million, six hundred sixty-three thousand, nine hundred fifty-seven".