39715989 has 4 divisors (see below), whose sum is σ = 52954656. Its totient is φ = 26477324.

The previous prime is 39715957. The next prime is 39716011. The reversal of 39715989 is 98951793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98951793 = 3 ⋅32983931.

It is a cyclic number.

It is not a de Polignac number, because 39715989 - 2⁵ = 39715957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39715919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6619329 + ... + 6619334.

It is an arithmetic number, because the mean of its divisors is an integer number (13238664).

Almost surely, 2^39715989 is an apocalyptic number.

It is an amenable number.

39715989 is a deficient number, since it is larger than the sum of its proper divisors (13238667).

39715989 is a wasteful number, since it uses less digits than its factorization.

39715989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13238666.

The product of its digits is 612360, while the sum is 51.

The square root of 39715989 is about 6302.0622815075. The cubic root of 39715989 is about 341.1838460769.

It can be divided in two parts, 39715 and 989, that added together give a palindrome (40704).

The spelling of 39715989 in words is "thirty-nine million, seven hundred fifteen thousand, nine hundred eighty-nine".