32172073 has 4 divisors (see below), whose sum is σ = 33865360. Its totient is φ = 30478788.

The previous prime is 32172061. The next prime is 32172083. The reversal of 32172073 is 37027123.

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: 37027123 = 7 ⋅5289589.

It is a cyclic number.

It is not a de Polignac number, because 32172073 - 2⁹ = 32171561 is a prime.

It is a super-2 number, since 2×32172073² = 2070084562234658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32172043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846615 + ... + 846652.

It is an arithmetic number, because the mean of its divisors is an integer number (8466340).

Almost surely, 2^32172073 is an apocalyptic number.

It is an amenable number.

32172073 is a deficient number, since it is larger than the sum of its proper divisors (1693287).

32172073 is a wasteful number, since it uses less digits than its factorization.

32172073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693286.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 32172073 is about 5672.0431063242. The cubic root of 32172073 is about 318.0482535586.

Adding to 32172073 its reverse (37027123), we get a palindrome (69199196).

The spelling of 32172073 in words is "thirty-two million, one hundred seventy-two thousand, seventy-three".