39639349 has 2 divisors, whose sum is σ = 39639350. Its totient is φ = 39639348.

The previous prime is 39639343. The next prime is 39639361. The reversal of 39639349 is 94393693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 8892324 = 5545^2 + 2982^2 .

It is a cyclic number.

It is not a de Polignac number, because 39639349 - 2¹³ = 39631157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39639299 and 39639308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39639343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19819674 + 19819675.

It is an arithmetic number, because the mean of its divisors is an integer number (19819675).

Almost surely, 2^39639349 is an apocalyptic number.

It is an amenable number.

39639349 is a deficient number, since it is larger than the sum of its proper divisors (1).

39639349 is an equidigital number, since it uses as much as digits as its factorization.

39639349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 46.

The square root of 39639349 is about 6295.9787960253. The cubic root of 39639349 is about 340.9642437777.

The spelling of 39639349 in words is "thirty-nine million, six hundred thirty-nine thousand, three hundred forty-nine".