7172938 has 4 divisors (see below), whose sum is σ = 10759410. Its totient is φ = 3586468.

The previous prime is 7172927. The next prime is 7172939. The reversal of 7172938 is 8392717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8392717 = 661 ⋅12697.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 187489 = 2643^2 + 433^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7172897 and 7172906.

It is not an unprimeable number, because it can be changed into a prime (7172939) 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 as a sum of consecutive naturals, namely, 1793233 + ... + 1793236.

Almost surely, 2^7172938 is an apocalyptic number.

7172938 is a deficient number, since it is larger than the sum of its proper divisors (3586472).

7172938 is a wasteful number, since it uses less digits than its factorization.

7172938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586471.

The product of its digits is 21168, while the sum is 37.

The square root of 7172938 is about 2678.2341197140. The cubic root of 7172938 is about 192.8556465754.

It can be divided in two parts, 717 and 2938, that added together give a triangular number (3655 = T₈₅).

The spelling of 7172938 in words is "seven million, one hundred seventy-two thousand, nine hundred thirty-eight".