38685961 has 2 divisors, whose sum is σ = 38685962. Its totient is φ = 38685960.

The previous prime is 38685949. The next prime is 38685967. The reversal of 38685961 is 16958683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38675961 + 10000 = 6219^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 38685961 - 2⁷ = 38685833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38685967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19342980 + 19342981.

It is an arithmetic number, because the mean of its divisors is an integer number (19342981).

Almost surely, 2^38685961 is an apocalyptic number.

It is an amenable number.

38685961 is a deficient number, since it is larger than the sum of its proper divisors (1).

38685961 is an equidigital number, since it uses as much as digits as its factorization.

38685961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 38685961 is about 6219.8039358166. The cubic root of 38685961 is about 338.2084571275.

The spelling of 38685961 in words is "thirty-eight million, six hundred eighty-five thousand, nine hundred sixty-one".