39505901 has 2 divisors, whose sum is σ = 39505902. Its totient is φ = 39505900.

The previous prime is 39505889. The next prime is 39505903. The reversal of 39505901 is 10950593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 10883401 = 5350^2 + 3299^2 .

It is a cyclic number.

It is not a de Polignac number, because 39505901 - 2¹⁰ = 39504877 is a prime.

Together with 39505903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39505903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19752950 + 19752951.

It is an arithmetic number, because the mean of its divisors is an integer number (19752951).

Almost surely, 2^39505901 is an apocalyptic number.

It is an amenable number.

39505901 is a deficient number, since it is larger than the sum of its proper divisors (1).

39505901 is an equidigital number, since it uses as much as digits as its factorization.

39505901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 39505901 is about 6285.3719858096. The cubic root of 39505901 is about 340.5811887765.

The spelling of 39505901 in words is "thirty-nine million, five hundred five thousand, nine hundred one".