38961869 has 2 divisors, whose sum is σ = 38961870. Its totient is φ = 38961868.

The previous prime is 38961863. The next prime is 38961887. The reversal of 38961869 is 96816983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 13053769 = 5090^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 38961869 - 2¹² = 38957773 is a prime.

It is a super-2 number, since 2×38961869² = 3036054471946322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38961863) 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, 19480934 + 19480935.

It is an arithmetic number, because the mean of its divisors is an integer number (19480935).

Almost surely, 2^38961869 is an apocalyptic number.

It is an amenable number.

38961869 is a deficient number, since it is larger than the sum of its proper divisors (1).

38961869 is an equidigital number, since it uses as much as digits as its factorization.

38961869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 38961869 is about 6241.9443284925. The cubic root of 38961869 is about 339.0105866523.

The spelling of 38961869 in words is "thirty-eight million, nine hundred sixty-one thousand, eight hundred sixty-nine".