32001391 has 4 divisors (see below), whose sum is σ = 32018800. Its totient is φ = 31983984.

The previous prime is 32001371. The next prime is 32001421. The reversal of 32001391 is 19310023.

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

It is a cyclic number.

It is not a de Polignac number, because 32001391 - 2¹¹ = 31999343 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 (32001311) 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, 5571 + ... + 9748.

It is an arithmetic number, because the mean of its divisors is an integer number (8004700).

Almost surely, 2^32001391 is an apocalyptic number.

32001391 is a deficient number, since it is larger than the sum of its proper divisors (17409).

32001391 is a wasteful number, since it uses less digits than its factorization.

32001391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17408.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 32001391 is about 5656.9771963479. The cubic root of 32001391 is about 317.4848104830.

The spelling of 32001391 in words is "thirty-two million, one thousand, three hundred ninety-one".