38965691 has 4 divisors (see below), whose sum is σ = 39006552. Its totient is φ = 38924832.

The previous prime is 38965643. The next prime is 38965709. The reversal of 38965691 is 19656983.

38965691 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, and also an emirpimes, since its reverse is a distinct semiprime: 19656983 = 29 ⋅677827.

It is a cyclic number.

It is not a de Polignac number, because 38965691 - 2¹⁴ = 38949307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38965601) 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, 18965 + ... + 20918.

It is an arithmetic number, because the mean of its divisors is an integer number (9751638).

Almost surely, 2^38965691 is an apocalyptic number.

38965691 is a deficient number, since it is larger than the sum of its proper divisors (40861).

38965691 is an equidigital number, since it uses as much as digits as its factorization.

38965691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40860.

The product of its digits is 349920, while the sum is 47.

The square root of 38965691 is about 6242.2504755897. The cubic root of 38965691 is about 339.0216714739.

The spelling of 38965691 in words is "thirty-eight million, nine hundred sixty-five thousand, six hundred ninety-one".