39868249 has 2 divisors, whose sum is σ = 39868250. Its totient is φ = 39868248.

The previous prime is 39868229. The next prime is 39868253. The reversal of 39868249 is 94286893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 90000 = 6307^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 39868249 - 2⁷ = 39868121 is a prime.

It is not a weakly prime, because it can be changed into another prime (39868229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19934124 + 19934125.

It is an arithmetic number, because the mean of its divisors is an integer number (19934125).

Almost surely, 2^39868249 is an apocalyptic number.

It is an amenable number.

39868249 is a deficient number, since it is larger than the sum of its proper divisors (1).

39868249 is an equidigital number, since it uses as much as digits as its factorization.

39868249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 39868249 is about 6314.1308982314. The cubic root of 39868249 is about 341.6192912566.

The spelling of 39868249 in words is "thirty-nine million, eight hundred sixty-eight thousand, two hundred forty-nine".