38047931 has 4 divisors (see below), whose sum is σ = 38076864. Its totient is φ = 38019000.

The previous prime is 38047927. The next prime is 38047963. The reversal of 38047931 is 13974083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13974083 = 571 ⋅24473.

It is a cyclic number.

It is not a de Polignac number, because 38047931 - 2² = 38047927 is a prime.

It is a super-2 number, since 2×38047931² = 2895290106761522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38047891 and 38047900.

It is not an unprimeable number, because it can be changed into a prime (38047231) 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, 12395 + ... + 15156.

It is an arithmetic number, because the mean of its divisors is an integer number (9519216).

Almost surely, 2^38047931 is an apocalyptic number.

38047931 is a deficient number, since it is larger than the sum of its proper divisors (28933).

38047931 is a wasteful number, since it uses less digits than its factorization.

38047931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28932.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 38047931 is about 6168.3004952742. The cubic root of 38047931 is about 336.3388346611.

The spelling of 38047931 in words is "thirty-eight million, forty-seven thousand, nine hundred thirty-one".