38731949 has 4 divisors (see below), whose sum is σ = 39632736. Its totient is φ = 37831164.

The previous prime is 38731943. The next prime is 38731969. The reversal of 38731949 is 94913783.

It is a happy number.

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: 94913783 = 89 ⋅1066447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38731949 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 (38731943) 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, 450329 + ... + 450414.

It is an arithmetic number, because the mean of its divisors is an integer number (9908184).

Almost surely, 2^38731949 is an apocalyptic number.

It is an amenable number.

38731949 is a deficient number, since it is larger than the sum of its proper divisors (900787).

38731949 is an equidigital number, since it uses as much as digits as its factorization.

38731949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900786.

The product of its digits is 163296, while the sum is 44.

The square root of 38731949 is about 6223.4997388929. The cubic root of 38731949 is about 338.3424193461.

The spelling of 38731949 in words is "thirty-eight million, seven hundred thirty-one thousand, nine hundred forty-nine".