39954689 has 2 divisors, whose sum is σ = 39954690. Its totient is φ = 39954688.

The previous prime is 39954671. The next prime is 39954731. The reversal of 39954689 is 98645993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21464689 + 18490000 = 4633^2 + 4300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39954689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39954689.

It is not a weakly prime, because it can be changed into another prime (39954619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19977344 + 19977345.

It is an arithmetic number, because the mean of its divisors is an integer number (19977345).

Almost surely, 2^39954689 is an apocalyptic number.

It is an amenable number.

39954689 is a deficient number, since it is larger than the sum of its proper divisors (1).

39954689 is an equidigital number, since it uses as much as digits as its factorization.

39954689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 53.

The square root of 39954689 is about 6320.9721562431. The cubic root of 39954689 is about 341.8660060110.

The spelling of 39954689 in words is "thirty-nine million, nine hundred fifty-four thousand, six hundred eighty-nine".