39740069 has 4 divisors (see below), whose sum is σ = 39754860. Its totient is φ = 39725280.

The previous prime is 39740059. The next prime is 39740083. The reversal of 39740069 is 96004793.

39740069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 24137569 + 15602500 = 4913^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 39740069 - 2⁴ = 39740053 is a prime.

It is a super-2 number, since 2×39740069² = 3158546168249522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39740009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102 + ... + 9159.

It is an arithmetic number, because the mean of its divisors is an integer number (9938715).

Almost surely, 2^39740069 is an apocalyptic number.

It is an amenable number.

39740069 is a deficient number, since it is larger than the sum of its proper divisors (14791).

39740069 is a wasteful number, since it uses less digits than its factorization.

39740069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14790.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 39740069 is about 6303.9724777318. The cubic root of 39740069 is about 341.2527859621.

The spelling of 39740069 in words is "thirty-nine million, seven hundred forty thousand, sixty-nine".