38731493 has 4 divisors (see below), whose sum is σ = 39980928. Its totient is φ = 37482060.

The previous prime is 38731487. The next prime is 38731529. The reversal of 38731493 is 39413783.

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: 39413783 = 227 ⋅173629.

It is a cyclic number.

It is not a de Polignac number, because 38731493 - 2⁸ = 38731237 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 (38731453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624671 + ... + 624732.

It is an arithmetic number, because the mean of its divisors is an integer number (9995232).

Almost surely, 2^38731493 is an apocalyptic number.

It is an amenable number.

38731493 is a deficient number, since it is larger than the sum of its proper divisors (1249435).

38731493 is a wasteful number, since it uses less digits than its factorization.

38731493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249434.

The product of its digits is 54432, while the sum is 38.

The square root of 38731493 is about 6223.4631034497. The cubic root of 38731493 is about 338.3410915469.

The spelling of 38731493 in words is "thirty-eight million, seven hundred thirty-one thousand, four hundred ninety-three".