39884869 has 2 divisors, whose sum is σ = 39884870. Its totient is φ = 39884868.

The previous prime is 39884863. The next prime is 39884891. The reversal of 39884869 is 96848893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28494244 + 11390625 = 5338^2 + 3375^2 .

It is a cyclic number.

It is not a de Polignac number, because 39884869 - 2³ = 39884861 is a prime.

It is a super-2 number, since 2×39884869² = 3181605550294322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39884861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19942434 + 19942435.

It is an arithmetic number, because the mean of its divisors is an integer number (19942435).

Almost surely, 2^39884869 is an apocalyptic number.

It is an amenable number.

39884869 is a deficient number, since it is larger than the sum of its proper divisors (1).

39884869 is an equidigital number, since it uses as much as digits as its factorization.

39884869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 55.

The square root of 39884869 is about 6315.4468567157. The cubic root of 39884869 is about 341.6667552911. Note that the first 3 decimals are identical.

The spelling of 39884869 in words is "thirty-nine million, eight hundred eighty-four thousand, eight hundred sixty-nine".