39344639 has 2 divisors, whose sum is σ = 39344640. Its totient is φ = 39344638.

The previous prime is 39344629. The next prime is 39344689. The reversal of 39344639 is 93644393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39344639 - 2⁴ = 39344623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39344596 and 39344605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39344629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19672319 + 19672320.

It is an arithmetic number, because the mean of its divisors is an integer number (19672320).

Almost surely, 2^39344639 is an apocalyptic number.

39344639 is a deficient number, since it is larger than the sum of its proper divisors (1).

39344639 is an equidigital number, since it uses as much as digits as its factorization.

39344639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 41.

The square root of 39344639 is about 6272.5305100892. The cubic root of 39344639 is about 340.1171424498.

The spelling of 39344639 in words is "thirty-nine million, three hundred forty-four thousand, six hundred thirty-nine".