39869161 has 2 divisors, whose sum is σ = 39869162. Its totient is φ = 39869160.

The previous prime is 39869147. The next prime is 39869177. The reversal of 39869161 is 16196893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23222761 + 16646400 = 4819^2 + 4080^2 .

It is an emirp because it is prime and its reverse (16196893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39869161 - 2¹³ = 39860969 is a prime.

It is not a weakly prime, because it can be changed into another prime (39869111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19934580 + 19934581.

It is an arithmetic number, because the mean of its divisors is an integer number (19934581).

Almost surely, 2^39869161 is an apocalyptic number.

It is an amenable number.

39869161 is a deficient number, since it is larger than the sum of its proper divisors (1).

39869161 is an equidigital number, since it uses as much as digits as its factorization.

39869161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 39869161 is about 6314.2031167836. The cubic root of 39869161 is about 341.6218961233.

The spelling of 39869161 in words is "thirty-nine million, eight hundred sixty-nine thousand, one hundred sixty-one".