38961649 has 2 divisors, whose sum is σ = 38961650. Its totient is φ = 38961648.

The previous prime is 38961631. The next prime is 38961683. The reversal of 38961649 is 94616983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38353249 + 608400 = 6193^2 + 780^2 .

It is an emirp because it is prime and its reverse (94616983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38961649 - 2¹¹ = 38959601 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38961599 and 38961608.

It is not a weakly prime, because it can be changed into another prime (38991649) 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, 19480824 + 19480825.

It is an arithmetic number, because the mean of its divisors is an integer number (19480825).

Almost surely, 2^38961649 is an apocalyptic number.

It is an amenable number.

38961649 is a deficient number, since it is larger than the sum of its proper divisors (1).

38961649 is an equidigital number, since it uses as much as digits as its factorization.

38961649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 38961649 is about 6241.9267057536. The cubic root of 38961649 is about 339.0099485715.

The spelling of 38961649 in words is "thirty-eight million, nine hundred sixty-one thousand, six hundred forty-nine".