38313993 has 8 divisors (see below), whose sum is σ = 51119488. Its totient is φ = 25525584.

The previous prime is 38313983. The next prime is 38313997. The reversal of 38313993 is 39931383.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38313993 - 2¹⁰ = 38312969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38313997) 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 7 ways as a sum of consecutive naturals, for example, 2496 + ... + 9102.

It is an arithmetic number, because the mean of its divisors is an integer number (6389936).

Almost surely, 2^38313993 is an apocalyptic number.

It is an amenable number.

38313993 is a deficient number, since it is larger than the sum of its proper divisors (12805495).

38313993 is a wasteful number, since it uses less digits than its factorization.

38313993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543.

The product of its digits is 52488, while the sum is 39.

The square root of 38313993 is about 6189.8298037991. The cubic root of 38313993 is about 337.1209989710.

The spelling of 38313993 in words is "thirty-eight million, three hundred thirteen thousand, nine hundred ninety-three".