32138993 has 4 divisors (see below), whose sum is σ = 34029540. Its totient is φ = 30248448.

The previous prime is 32138969. The next prime is 32139007. The reversal of 32138993 is 39983123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39983123 = 883 ⋅45281.

It can be written as a sum of positive squares in 2 ways, for example, as 24482704 + 7656289 = 4948^2 + 2767^2 .

It is a cyclic number.

It is not a de Polignac number, because 32138993 - 2⁸ = 32138737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32138923) 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, 945248 + ... + 945281.

It is an arithmetic number, because the mean of its divisors is an integer number (8507385).

Almost surely, 2^32138993 is an apocalyptic number.

It is an amenable number.

32138993 is a deficient number, since it is larger than the sum of its proper divisors (1890547).

32138993 is a wasteful number, since it uses less digits than its factorization.

32138993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890546.

The product of its digits is 34992, while the sum is 38.

The square root of 32138993 is about 5669.1262995280. The cubic root of 32138993 is about 317.9392082149.

The spelling of 32138993 in words is "thirty-two million, one hundred thirty-eight thousand, nine hundred ninety-three".