38772817 has 4 divisors (see below), whose sum is σ = 38811456. Its totient is φ = 38734180.

The previous prime is 38772793. The next prime is 38772821. The reversal of 38772817 is 71827783.

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: 71827783 = 971 ⋅73973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38772817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38772827) 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, 17773 + ... + 19834.

It is an arithmetic number, because the mean of its divisors is an integer number (9702864).

Almost surely, 2^38772817 is an apocalyptic number.

It is an amenable number.

38772817 is a deficient number, since it is larger than the sum of its proper divisors (38639).

38772817 is a wasteful number, since it uses less digits than its factorization.

38772817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38638.

The product of its digits is 131712, while the sum is 43.

The square root of 38772817 is about 6226.7822348304. The cubic root of 38772817 is about 338.4613781375.

The spelling of 38772817 in words is "thirty-eight million, seven hundred seventy-two thousand, eight hundred seventeen".