39407689 has 2 divisors, whose sum is σ = 39407690. Its totient is φ = 39407688.

The previous prime is 39407633. The next prime is 39407699. The reversal of 39407689 is 98670493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37112464 + 2295225 = 6092^2 + 1515^2 .

It is an emirp because it is prime and its reverse (98670493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39407689 - 2⁷ = 39407561 is a prime.

It is not a weakly prime, because it can be changed into another prime (39407629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19703844 + 19703845.

It is an arithmetic number, because the mean of its divisors is an integer number (19703845).

Almost surely, 2^39407689 is an apocalyptic number.

It is an amenable number.

39407689 is a deficient number, since it is larger than the sum of its proper divisors (1).

39407689 is an equidigital number, since it uses as much as digits as its factorization.

39407689 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 39407689 is about 6277.5543804893. The cubic root of 39407689 is about 340.2987253511.

The spelling of 39407689 in words is "thirty-nine million, four hundred seven thousand, six hundred eighty-nine".