39472109 has 2 divisors, whose sum is σ = 39472110. Its totient is φ = 39472108.

The previous prime is 39472087. The next prime is 39472129. The reversal of 39472109 is 90127493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39100009 + 372100 = 6253^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 39472109 - 2¹⁶ = 39406573 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39472129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19736054 + 19736055.

It is an arithmetic number, because the mean of its divisors is an integer number (19736055).

Almost surely, 2^39472109 is an apocalyptic number.

It is an amenable number.

39472109 is a deficient number, since it is larger than the sum of its proper divisors (1).

39472109 is an equidigital number, since it uses as much as digits as its factorization.

39472109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 39472109 is about 6282.6832643386. The cubic root of 39472109 is about 340.4840538992.

The spelling of 39472109 in words is "thirty-nine million, four hundred seventy-two thousand, one hundred nine".