38997593 has 4 divisors (see below), whose sum is σ = 40051620. Its totient is φ = 37943568.

The previous prime is 38997583. The next prime is 38997599. The reversal of 38997593 is 39579983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37112464 + 1885129 = 6092^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 38997593 - 2⁴ = 38997577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38997599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526958 + ... + 527031.

It is an arithmetic number, because the mean of its divisors is an integer number (10012905).

Almost surely, 2^38997593 is an apocalyptic number.

It is an amenable number.

38997593 is a deficient number, since it is larger than the sum of its proper divisors (1054027).

38997593 is a wasteful number, since it uses less digits than its factorization.

38997593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054026.

The product of its digits is 1837080, while the sum is 53.

The square root of 38997593 is about 6244.8052811917. The cubic root of 38997593 is about 339.1141675374.

The spelling of 38997593 in words is "thirty-eight million, nine hundred ninety-seven thousand, five hundred ninety-three".