39654389 has 2 divisors, whose sum is σ = 39654390. Its totient is φ = 39654388.

The previous prime is 39654367. The next prime is 39654409. The reversal of 39654389 is 98345693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20775364 + 18879025 = 4558^2 + 4345^2 .

It is an emirp because it is prime and its reverse (98345693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39654389 - 2¹² = 39650293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39654089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19827194 + 19827195.

It is an arithmetic number, because the mean of its divisors is an integer number (19827195).

Almost surely, 2^39654389 is an apocalyptic number.

It is an amenable number.

39654389 is a deficient number, since it is larger than the sum of its proper divisors (1).

39654389 is an equidigital number, since it uses as much as digits as its factorization.

39654389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 39654389 is about 6297.1730959217. The cubic root of 39654389 is about 341.0073613189.

The spelling of 39654389 in words is "thirty-nine million, six hundred fifty-four thousand, three hundred eighty-nine".