39845149 has 2 divisors, whose sum is σ = 39845150. Its totient is φ = 39845148.

The previous prime is 39845123. The next prime is 39845167. The reversal of 39845149 is 94154893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30173049 + 9672100 = 5493^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 39845149 - 2⁷ = 39845021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39845549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19922574 + 19922575.

It is an arithmetic number, because the mean of its divisors is an integer number (19922575).

Almost surely, 2^39845149 is an apocalyptic number.

It is an amenable number.

39845149 is a deficient number, since it is larger than the sum of its proper divisors (1).

39845149 is an equidigital number, since it uses as much as digits as its factorization.

39845149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 39845149 is about 6312.3014028166. The cubic root of 39845149 is about 341.5532994759.

The spelling of 39845149 in words is "thirty-nine million, eight hundred forty-five thousand, one hundred forty-nine".