39715969 has 4 divisors (see below), whose sum is σ = 39734100. Its totient is φ = 39697840.

The previous prime is 39715957. The next prime is 39716011. The reversal of 39715969 is 96951793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25877569 + 13838400 = 5087^2 + 3720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39715969 is a prime.

It is a super-2 number, since 2×39715969² = 3154716387217922, which contains 22 as substring.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5242 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (9933525).

Almost surely, 2^39715969 is an apocalyptic number.

It is an amenable number.

39715969 is a deficient number, since it is larger than the sum of its proper divisors (18131).

39715969 is a wasteful number, since it uses less digits than its factorization.

39715969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18130.

The product of its digits is 459270, while the sum is 49.

The square root of 39715969 is about 6302.0606947252. The cubic root of 39715969 is about 341.1837888063.

The spelling of 39715969 in words is "thirty-nine million, seven hundred fifteen thousand, nine hundred sixty-nine".