38965561 has 4 divisors (see below), whose sum is σ = 41016400. Its totient is φ = 36914724.

The previous prime is 38965559. The next prime is 38965573. The reversal of 38965561 is 16556983.

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.

It is a cyclic number.

It is not a de Polignac number, because 38965561 - 2¹ = 38965559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38965261) 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, 1025391 + ... + 1025428.

It is an arithmetic number, because the mean of its divisors is an integer number (10254100).

Almost surely, 2^38965561 is an apocalyptic number.

It is an amenable number.

38965561 is a deficient number, since it is larger than the sum of its proper divisors (2050839).

38965561 is a wasteful number, since it uses less digits than its factorization.

38965561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050838.

The product of its digits is 194400, while the sum is 43.

The square root of 38965561 is about 6242.2400626698. The cubic root of 38965561 is about 339.0212944511.

The spelling of 38965561 in words is "thirty-eight million, nine hundred sixty-five thousand, five hundred sixty-one".