38813961 has 4 divisors (see below), whose sum is σ = 51751952. Its totient is φ = 25875972.

The previous prime is 38813959. The next prime is 38813981. The reversal of 38813961 is 16931883.

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: 16931883 = 3 ⋅5643961.

It is not a de Polignac number, because 38813961 - 2¹ = 38813959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38813911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6468991 + ... + 6468996.

It is an arithmetic number, because the mean of its divisors is an integer number (12937988).

Almost surely, 2^38813961 is an apocalyptic number.

It is an amenable number.

38813961 is a deficient number, since it is larger than the sum of its proper divisors (12937991).

38813961 is a wasteful number, since it uses less digits than its factorization.

38813961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12937990.

The product of its digits is 31104, while the sum is 39.

The square root of 38813961 is about 6230.0851519060. The cubic root of 38813961 is about 338.5810559011.

The spelling of 38813961 in words is "thirty-eight million, eight hundred thirteen thousand, nine hundred sixty-one".