39706489 has 2 divisors, whose sum is σ = 39706490. Its totient is φ = 39706488.

The previous prime is 39706451. The next prime is 39706517. The reversal of 39706489 is 98460793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39476089 + 230400 = 6283^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 39706489 - 2⁷ = 39706361 is a prime.

It is not a weakly prime, because it can be changed into another prime (39706889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19853244 + 19853245.

It is an arithmetic number, because the mean of its divisors is an integer number (19853245).

Almost surely, 2^39706489 is an apocalyptic number.

It is an amenable number.

39706489 is a deficient number, since it is larger than the sum of its proper divisors (1).

39706489 is an equidigital number, since it uses as much as digits as its factorization.

39706489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 39706489 is about 6301.3085149039. The cubic root of 39706489 is about 341.1566403672.

The spelling of 39706489 in words is "thirty-nine million, seven hundred six thousand, four hundred eighty-nine".