38772709 has 4 divisors (see below), whose sum is σ = 39303916. Its totient is φ = 38241504.

The previous prime is 38772667. The next prime is 38772751. The reversal of 38772709 is 90727783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90727783 = 773 ⋅117371.

It is an interprime number because it is at equal distance from previous prime (38772667) and next prime (38772751).

It can be written as a sum of positive squares in 2 ways, for example, as 12404484 + 26368225 = 3522^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 38772709 - 2⁷ = 38772581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38772109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265494 + ... + 265639.

It is an arithmetic number, because the mean of its divisors is an integer number (9825979).

Almost surely, 2^38772709 is an apocalyptic number.

It is an amenable number.

38772709 is a deficient number, since it is larger than the sum of its proper divisors (531207).

38772709 is an equidigital number, since it uses as much as digits as its factorization.

38772709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531206.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 38772709 is about 6226.7735626085. The cubic root of 38772709 is about 338.4610638807.

The spelling of 38772709 in words is "thirty-eight million, seven hundred seventy-two thousand, seven hundred nine".