39915149 has 2 divisors, whose sum is σ = 39915150. Its totient is φ = 39915148.

The previous prime is 39915131. The next prime is 39915157. The reversal of 39915149 is 94151993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 136900 = 6307^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 39915149 - 2⁸ = 39914893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39915179) 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, 19957574 + 19957575.

It is an arithmetic number, because the mean of its divisors is an integer number (19957575).

Almost surely, 2^39915149 is an apocalyptic number.

It is an amenable number.

39915149 is a deficient number, since it is larger than the sum of its proper divisors (1).

39915149 is an equidigital number, since it uses as much as digits as its factorization.

39915149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 41.

The square root of 39915149 is about 6317.8436986048. The cubic root of 39915149 is about 341.7531961948.

The spelling of 39915149 in words is "thirty-nine million, nine hundred fifteen thousand, one hundred forty-nine".