39844157 has 2 divisors, whose sum is σ = 39844158. Its totient is φ = 39844156.

The previous prime is 39844127. The next prime is 39844177. The reversal of 39844157 is 75144893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35868121 + 3976036 = 5989^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 39844157 - 2¹⁶ = 39778621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39844127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19922078 + 19922079.

It is an arithmetic number, because the mean of its divisors is an integer number (19922079).

Almost surely, 2^39844157 is an apocalyptic number.

It is an amenable number.

39844157 is a deficient number, since it is larger than the sum of its proper divisors (1).

39844157 is an equidigital number, since it uses as much as digits as its factorization.

39844157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 39844157 is about 6312.2228255980. Note that the first 3 decimals coincide. The cubic root of 39844157 is about 341.5504649721.

The spelling of 39844157 in words is "thirty-nine million, eight hundred forty-four thousand, one hundred fifty-seven".